{"title":"Kohler 80mm rebuild parts (CH23, CH670, CH680, CV23, CV680)","description":null,"products":[{"product_id":"80mm-ring-and-gasket-kit-fits-kohler-ch23-ch680-cv680-1-5mm-m1-vyvm-qh0g","title":"80mm Ring and Gasket Kit Fits Kohler CH23 CH680 CV680 1.5mm","description":"\u003cp\u003eA ring and gasket kit for the Kohler 80mm, 674cc twin-cylinder engines with Style A pistons. The kit contains two ring sets with a 1.5mm top ring, second ring and three-piece oil ring, the head gaskets, the valve cover gaskets, crankshaft seals and sump sealant. Pistons, rods and valves are not included; the kit re-rings the pistons already in the engine. These engines were built with two ring groove styles, so measure the old top ring first: 1.5mm is Style A and takes this kit, while 1.2mm is Style B and needs the Style B kit. It fits the CH22, CH23, CH620, CH621, CH640, CH641, CH670, CH680 and CH682 and the CV22, CV23, CV620, CV640, CV670 and CV680 at 80mm bore. Some CH22, CH620, CH640 and CV620 engines are the 77mm, 624cc version, so check the displacement on the nameplate. It replaces ring sets 24-108-18-S and 24-108-08-S. The top and second rings can go in either way up. Before assembly, check each bore for taper and out of round and the ring grooves for wear, check ring end gap in the bore, and use a ring compressor.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRINGS AND GASKETS - Two ring sets with a 1.5mm top ring (Style A), the head gaskets, the valve cover gaskets, crankshaft seals and sump sealant. Pistons are not included; this kit re-rings the pistons already in the engine.\u003c\/li\u003e\n\u003cli\u003eSTYLE A, 1.5MM ONLY - Measure the old top ring before ordering. 1.5mm is Style A and takes this kit; 1.2mm is Style B and needs the Style B kit. Ring-only kits have to match the grooves of the piston they go on.\u003c\/li\u003e\n\u003cli\u003eFITS KOHLER 80MM, 674CC TWINS - CH22, CH23, CH620, CH621, CH640, CH641, CH670, CH680, CH682, CV22, CV23, CV620, CV640, CV670 and CV680. Some CH22, CH620, CH640 and CV620 engines are the 77mm, 624cc version, so check the displacement on the nameplate.\u003c\/li\u003e\n\u003cli\u003eREPLACES RING SETS 24-108-18-S AND 24-108-08-S - If your parts list shows either number for your engine, this kit covers it. The top and second rings can go in either way up.\u003c\/li\u003e\n\u003cli\u003eMEASURE BEFORE IT GOES TOGETHER - Check each bore for taper and out of round and the ring grooves for wear; rings will not seal a scored or out-of-round bore. Check ring end gap in the bore, and use a ring compressor.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009609658522,"sku":"M1-VYVM-QH0G","price":139.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/71rOZlRDwRL.jpg?v=1793382637"},{"product_id":"two-sets-kohler-80mm-piston-rings-1-2mm-style-b-24-108-26-s-1v-b7sj-3e6o","title":"Two Sets Kohler 80mm Piston Rings 1.2mm Style B 24-108-26-S","description":"\u003cp\u003eTwo sets of standard bore piston rings for Kohler 674cc, 80mm twin-cylinder engines, Style B with a 1.2mm top compression ring. Replaces Kohler 24-108-26-S, 24 108 26-S and 2410826. Four rings per set, with a 1.2mm top compression ring. Two sets in the box, which is one complete twin-cylinder engine. Fits CH23, CV23, CH670, CH680, CV680 and CH682. CH620, CH640, CV620 and CV640 need checking. Kohler changed those engines from 624cc on a 77mm bore to 674cc on an 80mm bore partway through production, and the model number on the badge will not tell you which one you have. The displacement is printed on the engine nameplate. Read it before you order. CH20 is 77mm throughout and takes a different ring set. Style A against Style B is the other thing to get right. Kohler used two piston designs in the same engines. Style B takes a 1.2mm top ring, Style A takes 1.5mm. The style follows the piston that is in your engine, not the model number, so measure the top ring you are pulling out. If it comes out at 1.5mm, the set you want is 24-108-18-S. Top and second rings are bidirectional. Rings only - pistons, wrist pins, clips and gaskets are not included. Hone both cylinders for a crosshatch before you fit them; rings will not seal against a glazed bore. The oversize ladder for this bore, Style B: 24-108-27-S is .08 over, 24-108-28-S is .25 over, 24-108-29-S is .50 over. The 83mm standard Style B set is 25-108-01-S.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTWO SETS - ENOUGH FOR ONE TWIN CYLINDER ENGINE - Four rings per set, with a 1.2mm top compression ring. Two sets in the box, so one order does both cylinders and you are not waiting on a second delivery halfway through the job.\u003c\/li\u003e\n\u003cli\u003eREPLACES KOHLER 24-108-26-S - Also written 24 108 26-S and 2410826. Standard bore, 80mm. This is the standard bore Style B set that Kohler still supplies, which is more than can be said for the Style A equivalent.\u003c\/li\u003e\n\u003cli\u003eFITS 674CC AND 80MM KOHLER TWINS - CH23, CV23, CH670, CH680, CV680 and CH682. CH620, CH640, CV620 and CV640 came both ways: Kohler changed those from 624cc on a 77mm bore to 674cc on an 80mm bore during production. Read the displacement off the engine nameplate before ordering. CH20 is 77mm and takes a different set.\u003c\/li\u003e\n\u003cli\u003eSTYLE B IS THE 1.2MM TOP RING - MEASURE BEFORE YOU ORDER - Kohler ran two piston designs in these same engines. Style B takes a 1.2mm top ring and Style A takes 1.5mm. Mic the top ring you are pulling out, or measure the top ring groove. If yours is 1.5mm you need 24-108-18-S instead. Style follows the piston, not the model number.\u003c\/li\u003e\n\u003cli\u003eRINGS FIX SOME THINGS AND NOT OTHERS - They cure oil consumption and blowby on a bore that is still round, within taper and showing crosshatch. On a scored or hard glazed cylinder they will not seal. Hone both cylinders for a crosshatch before you fit them. Top and second rings are bidirectional. Rings only - pistons, wrist pins, clips and gaskets are not included.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009614016666,"sku":"1V-B7SJ-3E6O","price":69.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/71qj6RhlhXL.jpg?v=1793382734"},{"product_id":"kohler-80mm-piston-rings-1-5mm-style-a-ch23-cv23-24-108-18-s-be-7rml-fwcn","title":"Kohler 80mm Piston Rings 1.5mm Style A CH23 CV23 24-108-18-S","description":"\u003cp\u003eOne set of standard bore piston rings for Kohler 674cc, 80mm twin-cylinder engines, Style A with a 1.5mm top compression ring. Replaces Kohler 24-108-08-S, 24-108-18-S, 2410808 and 2410818. Five rings per set, with a 1.5mm top compression ring. This listing is one set, enough for one cylinder. A twin-cylinder engine needs two sets. Fits CH23, CV23, CH670, CH680, CV680 and CH682. CH620, CH640, CV620 and CV640 need a check. Kohler changed those engines from 624cc on a 77mm bore to 674cc on an 80mm bore partway through production, and the model number on the badge does not tell you which one you have. The displacement is printed on the engine nameplate. Read it before you order. Style A against Style B is the other thing to get right. Kohler used two piston designs in the same engines. Style A takes a 1.5mm top ring, Style B takes 1.2mm. The style follows the piston in your engine, not the model number, so measure the top ring you are pulling out. If it comes out at 1.2mm you want 24-108-26-S instead. Top and second rings are bidirectional. Rings only - pistons, wrist pins, clips and gaskets are not included. Hone the cylinder for a crosshatch before you fit them; rings will not seal against a glazed bore. Related standard bore Style A sets in other bores: 77mm is 24-108-22-S, 83mm is 24-108-14-S.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFIVE PIECE RING SET, 80MM STANDARD BORE, STYLE A - Five rings per set, with a 1.5mm top compression ring. This is ONE set, which does ONE cylinder. A twin-cylinder engine takes two sets, so order two if you are doing the whole engine rather than chasing one bad cylinder.\u003c\/li\u003e\n\u003cli\u003eREPLACES KOHLER 24-108-08-S AND 24-108-18-S - Also written 24 108 08-S, 2410808, 24-108-18, 24 108 18-S and 2410818. Kohler superseded 24-108-08-S to 24-108-18-S, so both numbers point at this same standard bore Style A set.\u003c\/li\u003e\n\u003cli\u003eFITS 674CC AND 80MM KOHLER TWINS - CH23, CV23, CH670, CH680, CV680 and CH682. CH620, CH640, CV620 and CV640 came both ways: Kohler changed those from 624cc on a 77mm bore to 674cc on an 80mm bore during production. Read the displacement off the engine nameplate before ordering. CH20 is 77mm and takes a different set.\u003c\/li\u003e\n\u003cli\u003eSTYLE A IS THE 1.5MM TOP RING - MEASURE BEFORE YOU ORDER - Kohler ran two piston designs in these same engines. Style A takes a 1.5mm top ring and Style B takes 1.2mm. Mic the top ring you are pulling out, or measure the top ring groove. If yours is 1.2mm you need the Style B set, 24-108-26-S. Style follows the piston, not the model number.\u003c\/li\u003e\n\u003cli\u003eRINGS FIX SOME THINGS AND NOT OTHERS - They cure oil consumption and blowby on a bore that is still round, within taper and showing crosshatch. On a scored or hard glazed cylinder they will not seal and you will be back inside the engine. Hone for a crosshatch before you fit them. Top and second rings are bidirectional. Rings only - pistons, wrist pins, clips and gaskets are not included.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009620537498,"sku":"BE-7RML-FWCN","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/61zwxqne4BL.jpg?v=1793382925"},{"product_id":"2-ring-sets-fits-kohler-80mm-ch23-ch680-cv680-style-a-3v-byd2-m0zu","title":"2 Ring Sets Fits Kohler 80mm CH23 CH680 CV680 Style A","description":"\u003cp\u003eTwo standard 80mm Style A piston ring sets for the Kohler 674cc twin-cylinder engines, one per cylinder. Each set has a 1.5mm top compression ring, a second ring and a three-piece oil ring. Pistons and gaskets are not included. Measure the old top ring first: 1.5mm is Style A and takes these sets, while 1.2mm is Style B and needs the Style B set. They fit the CH22, CH23, CH620, CH621, CH640, CH641, CH670, CH680 and CH682 and the CV22, CV23, CV620, CV640, CV670 and CV680; some CH22, CH620, CH640 and CV620 engines are the 77mm version, so check the displacement on the nameplate. They replace 24-108-18-S and the earlier 24-108-08-S. Rings will not seal a scored, glazed or out-of-round bore, so measure taper and out of round, hone lightly and check the end gap of each ring in its bore.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTWO STANDARD RING SETS - One set per cylinder: a 1.5mm top compression ring (Style A), a second ring and a three-piece oil ring. Pistons and gaskets are not included.\u003c\/li\u003e\n\u003cli\u003eSTYLE A, 1.5MM ONLY - Measure the old top ring before ordering. 1.5mm is Style A and takes these; 1.2mm is Style B and needs the Style B set.\u003c\/li\u003e\n\u003cli\u003eFITS KOHLER 80MM, 674CC TWINS - CH22, CH23, CH620, CH621, CH640, CH641, CH670, CH680, CH682, CV22, CV23, CV620, CV640, CV670 and CV680. Some CH22, CH620, CH640 and CV620 engines are the 77mm version, so check the displacement on the nameplate.\u003c\/li\u003e\n\u003cli\u003eREPLACES 24-108-18-S - 24-108-08-S is the earlier number for the same set. If your parts list shows either, these sets cover it.\u003c\/li\u003e\n\u003cli\u003eCHECK THE BORE FIRST - Rings will not seal a scored, glazed or out-of-round bore. Measure taper and out of round, hone lightly for a crosshatch, and check the end gap of each ring in the bore it will run in.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009632235674,"sku":"3V-BYD2-M0ZU","price":69.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/71JRpELwaRL.jpg?v=1793383071"},{"product_id":"intake-valve-compatible-with-kohler-ch23-ch25-ch26-ch740-ch742-ch750-c-pi-30tq-45vp","title":"Intake Valve Compatible With Kohler CH23, CH25, CH26, CH740 CH742 CH750, CH18, CH20, CH22, SV840 Replaces Part # 24-017-01-S","description":"\u003cp\u003eIntake Valve Compatible With Kohler CH23, CH25, CH26, CH740 CH742 CH750, CH18, CH20, CH22, SV840 Replaces Part # 24-017-01-S\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eONE STANDARD INTAKE VALVE - This is one valve, replacing Kohler 24-017-01-S. Kohler's twins have two cylinders and therefore two intake valves, so order two if you are doing both heads. There is also a 0.25mm oversize stem version, 24-017-02-S, for a head whose guide has been reamed oversize.\u003c\/li\u003e\n\u003cli\u003eFITS THE COMMAND AND COMMAND PRO TWINS - CH23, CH25, CH26, CH740 and CH750, together with the vertical shaft CV equivalents. Read the model and spec numbers off the blower housing decal. The matching exhaust valve is 32-016-01-S, which supersedes the older 24-016-01-S, and the valve stem seal is 25-032-14-S.\u003c\/li\u003e\n\u003cli\u003eINTAKE AND EXHAUST ARE NOT THE SAME PART - Do not fit an intake valve in an exhaust seat. The exhaust valve runs hotter, works harder and usually fails first, which is why they are sold separately. If you are in the head for a burnt exhaust valve, the intake is often still serviceable.\u003c\/li\u003e\n\u003cli\u003eCHECK THE SEAT AND THE GUIDE BEFORE FITTING - A new valve onto a pitted seat or into a worn guide buys a few hours. Seat and face angle is 45 degrees. Guide inside diameter when new is 7.038 to 7.058mm, with a wear limit of 7.134mm on the intake. Stem to guide clearance on the intake is 0.038 to 0.076mm.\u003c\/li\u003e\n\u003cli\u003eSETTING IT UP - Lap the valve until the seating ring is even all the way round, then clean every trace of lapping compound out of the port and the guide before assembly. Fit a new stem seal while the head is apart. These engines use hydraulic lifters, so there is no lash to set, but turn the engine over by hand before the first start.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009648816282,"sku":"PI-30TQ-45VP","price":23.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/319i_fGZywL.jpg?v=1793383205"},{"product_id":"kohler-80mm-standard-piston-and-rings-ch23-cv23-25-874-54-s-3b-vrxc-cm6i","title":"Kohler 80mm Standard Piston and Rings CH23 CV23 25-874-54-S","description":"\u003cp\u003eCompatible with Kohler CV23, CH23, engines with 80MM bore, 25-874-54-S. Piston and Piston Rings Specs Piston to Piston Pin Clearance, mm (in) ..................... 0.006-0.017 (0.0002-0.0007) Piston Pin Bore Inside Diameter, mm (in) ..................... 17.006-17.012 (0.6695-0.6698) Piston Pin Outside Diameter, mm (in) ..................... 16.995-17.000 (0.6691-0.6693) Top Compression Ring Groove Clearance, mm (in) ..................... 0.025-0.048 (0.0010-0.0019) Middle Compression Ring Groove Clearance, mm (in) ..................... 0.015-0.037 (0.0006-0.0015) Oil Control Ring Groove Clearance, mm (in) ..................... 0.026-0.176 (0.0010-0.0070) Top and Middle Compression Ring End Gap, mm (in) ..................... 0.25-0.56 (0.0100-0.0224) Piston Thrust Face Outside Diameter (Std), mm (in) ..................... 82.986 (3.2671) Piston Thrust Face Outside Diameter (Wear Limit), mm (in) ..................... 82.841 (3.2614) Piston Thrust Face to Cylinder Bore Clearance, mm (in) ..................... 0.001-0.045 (0.039-0.0018)\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSTANDARD 80MM PISTON WITH RINGS - One piston complete with its ring set for the 80mm Kohler twins, CH23 and CV23. Sized for the 80.00mm standard bore. A twin cylinder engine needs two, so order two if you are doing both cylinders rather than discovering it halfway through the job.\u003c\/li\u003e\n\u003cli\u003eTHE BORE IS THE ONLY THING TO CHECK - 80.00mm is this piston. Kohler also built 77mm and 83mm twins and neither takes this part. You do not need to work out whether your engine ran 1.5mm or 1.2mm rings: the piston and its rings ship together as a matched set, so they agree with each other. That question only matters when buying rings on their own. The top and second rings are bidirectional, and the oil control rails and expander go in in order.\u003c\/li\u003e\n\u003cli\u003eWHAT THE 80MM FAMILY COVERS - CH23 and CV23, CH670 and CV670, CH680 and CV680, and the CH6208 and CH6408. These are the 674cc engines. Read the model and spec numbers off the blower housing decal rather than going by horsepower, because the same horsepower was sold on more than one block.\u003c\/li\u003e\n\u003cli\u003eWHAT TO CHECK WHILE THE CYLINDER IS OPEN - Measure the bore for taper and out of round before you commit. More than a few thousandths of taper and a new piston will not seal, and the block wants boring and an oversize piston instead. Check ring end gap in the bore the rings will actually run in, and side clearance in the piston groove.\u003c\/li\u003e\n\u003cli\u003eWHAT ELSE THE JOB WANTS - Scuff the bore with a hone so the rings have a surface to bed into. Clean the closure plate and oil pan faces back to bare metal before any sealant goes on. These engines run hydraulic lifters, so there is no valve lash to set afterwards, but turn the engine over by hand before the first start.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009649242266,"sku":"3B-VRXC-CM6I","price":99.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/71ss1GWZapS.jpg?v=1793383227"},{"product_id":"valve-cover-o-rings-compatible-with-kohler-cv18-cv20-cv22-cv25-cv620-c-pi-k609-h32q","title":"Valve Cover O-Rings Compatible with Kohler CV18, CV20, CV22, CV25, CV620, CV740, CV750, CV23, Replaces #24-153-30-S","description":"\u003cp\u003eKeep your engine running smoothly with these Two Valve Cover O-rings Compatible with Kohler CV18, CV20 CV22 CV25 CV620 CV740 CV750 CV23, Replaces # 24-153-30-S. These high-quality O-rings are designed to provide a reliable seal and prevent leaks in your Kohler engine's valve cover. Crafted from durable materials, they offer long-lasting performance and resistance to wear and tear. Ensure proper maintenance and extend the lifespan of your equipment with these essential replacement parts. Upgrade your Kohler engine today with these compatible valve cover O-rings and experience smooth, uninterrupted operation.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTWO VALVE COVER O-RINGS - A pair of valve cover O-rings replacing Kohler 24-153-30-S, for the CV18, CV20, CV22, CV23, CV25, CV620, CV740 and CV750. Two per order, which is one per valve cover on a twin.\u003c\/li\u003e\n\u003cli\u003eWHY THEY LEAK, AND WHEN TO CHANGE THEM - A valve cover O-ring hardens and takes a set, and then it weeps oil down the side of the engine where it looks like a far worse leak than it is. They cost very little and they are the first thing to change on an oil film around the valve covers.\u003c\/li\u003e\n\u003cli\u003eFIT IT DRY AND DO NOT OVERTIGHTEN - Clean the groove in the cover and the sealing face on the head before the new ring goes in. These seal by being squeezed, not by being crushed, so a cover pulled down too hard will distort and leak again. Check the cover itself is flat while it is off.\u003c\/li\u003e\n\u003cli\u003eWHAT ELSE TO LOOK AT WHILE THE COVER IS OFF - This is the easiest look you will get at the valve train. Check the rocker arms for wear and the pushrods for straightness by rolling them on a flat surface. On a hydraulic lifter engine there is no lash to set, but a noisy top end is worth investigating while you are in there.\u003c\/li\u003e\n\u003cli\u003eRELATED PARTS - The breather gasket, head gasket and valve stem seals all sit in the same job. The valve stem seal is 25-032-14-S. If the engine is using oil rather than leaking it, the stem seals are the more likely cause and the covers are only where you noticed it.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009653338266,"sku":"PI-K609-H32Q","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/41wVoI5aTIL.jpg?v=1793383272"},{"product_id":"two-valve-seals-compatible-with-kohler-ch18-ch20-ch22-ch23-ch25-ch640-pd-bgvn-lf03","title":"Two Valve Seals Compatible with Kohler CH18, CH20, CH22, CH23, CH25, CH640, CH730, CH740 Replaces Part Numbers: 25-032-14-s, 2503214, 25 032 14 S, 25 032 14","description":"\u003cp\u003eTwo Brand New Valve Seals Compatible With Kohler CH18, CH20, CH22, CH23, CH25, CH640, CH730, CH740, CH748, CH750, ECH750, CV18, CV20, CV22, CV23, CV25, CV27, CV640, CV680, CV730, CV742, CV745, CV750, ECV750 Note: These seals are oil and heat resistant and resist swelling Replaces Kohler Part Number: 25-032-14-s, 2503214, 25 032 14 S, 25 032 14 These Valve Seals Are Oil And Heat-resistant And Resist Swelling\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTWO VALVE STEM SEALS - A pair of valve stem seals replacing Kohler 25-032-14-S, also written 2503214 and 25 032 14 S. Two per order, which covers one cylinder head on a twin. Order two packs if you are doing both heads.\u003c\/li\u003e\n\u003cli\u003eFITS THE KOHLER COMMAND AND COMMAND PRO TWINS - CH18, CH20, CH22, CH23, CH25, CH620 and CH640, together with the vertical shaft CV equivalents and the CV730, CV740 and CV750. Read the model and spec numbers off the blower housing decal.\u003c\/li\u003e\n\u003cli\u003eFIT THEM WHENEVER THE HEAD COMES OFF - A hardened stem seal lets oil down the guide, which shows as smoke on start up and oil consumption with no external leak. They cost very little, they are the part most often reused, and the head is already apart - change them.\u003c\/li\u003e\n\u003cli\u003eCHECK THE GUIDE WHILE YOU ARE THERE - A new seal in a worn guide will not cure oil consumption. Guide inside diameter when new is 7.038 to 7.058mm; replace at 7.134mm on the intake or 7.159mm on the exhaust. Measure the valve stems you intend to reuse as well as the guides.\u003c\/li\u003e\n\u003cli\u003eASSEMBLY NOTES - Fit the seal squarely and do not knock it out of shape getting it over the stem. Lubricate the stem before the valve goes through so the lip is not cut on first assembly. These engines use hydraulic lifters, so there is no lash to set afterwards, but turn the engine over by hand before the first start.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009653567642,"sku":"PD-BGVN-LF03","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/51UXLVl5-KL.jpg?v=1793383274"},{"product_id":"kohler-engine-rebuild-kit-for-80mm-ch23-ch680-ch620-cv23-cv680-p4-mwpi-w81n","title":"Kohler Engine Rebuild Kit for 80mm CH23 CH680 CH620 CV23 CV680","description":"\u003cp\u003eLil Red Barn 80mm Engine Rebuild Kit for Kohler Command Pro V-Twin Engines A complete top-end overhaul kit for Kohler's 674cc Command Pro V-twin engines. Restores compression, eliminates oil burning, and seals the engine properly for another decade of service in commercial and residential outdoor power equipment. WHAT'S INCLUDED 2 high-quality 80mm standard bore pistons (25-874-54-S) with wrist pins and circlips 2 complete piston ring sets (top and second compression rings are bidirectional for easier installation) Complete gasket set including head gaskets, valve cover gaskets, intake and exhaust gaskets, and small O-rings 2 crankshaft oil seals Tube of crankcase sealer for proper crankcase joining CRITICAL: VERIFY 80mm BORE BEFORE ORDERING Kohler produced CH620 and CH640 engines in TWO different bore sizes during production: Early production: 77mm bore, 624cc displacement (this kit does NOT fit) Later production: 80mm bore, 674cc displacement (this kit fits) Check your engine's data plate for the displacement (should read 674cc for compatibility), or measure your existing piston or cylinder bore directly. Engines with \"674cc\" stamped on the nameplate are the correct application for this kit. COMPATIBLE KOHLER ENGINES (80mm bore, 674cc) Horizontal shaft (CH): CH22, CH23, CH620, CH621, CH640, CH641, CH670, CH680, CH682 Vertical shaft (CV): CV22, CV23, CV620, CV640, CV670, CV680 All are 4-cycle gasoline OHV V-twin engines with cast iron cylinder liners and aluminum blocks, rated 22 HP to 24 HP. FITS SPEC-NUMBER VARIATIONS This kit fits the piston, ring, and gasket applications for the following Kohler spec numbers (partial list - if your spec number begins with CH620-, CH640-, CH670-, CH680-, CV620-, CV640-, CV670-, or CV680- and your engine is 80mm bore, this kit is compatible): CH23-76510, CH23-76524, CH23-76540, CH23-76541, CH23-76558, CH23-76570, CH23-76584, CH23-76586, CH23-76590, CH23-76596, CH23-76621, CH23-76623, CH23-76634, CH23-76636, CH23-76638, CH23-76640, CH23-76642, CH680-3001, CH680-3010, CH680-3012, CH680-3013, CH680-3015, CH680-3016, CH680-3019, CH680-3024, CH680-3025, CH680-3028, CH680-3029, CH680-3030, CH680-3032, CH680-3033, CH680-3034, CH680-3035, CH680-3036, CH680-3037, CH680-3038, CH680-3039, CH680-3040, CH680-3047, CH680-3048, CH680-3049, CH680-3051, CH680-3052, CH680-3053, CH680-3054, CH680-3055, CH680-3056, CH680-3058, CH680-3059, CH680-3060, CH680-3061, CH680-3062, CH680-3063, CH680-3072, CH680-3080, CH680-3081, CH680-3082, CH680-3083, CH680-3085, CH680-3086, CH680-3087, CH680-3088, CH680-3090, CH680-3091, CH680-3092, CH680-3093, CH680-3094, CH680-3095, CH680-3096, CH680-3100, CH680-3101, CH680-3105, CH680-3106, CH680-3107, CH680-3108, CH680-3111, CH680-3112, CH680-3113, CH680-3117, CH680-3118, CH680-3119, CH680-3120, CH680-3121, CH680-3127, CH680-3128, CV23-75520, CV23-75553, CV23-75579, CV23-75588, CV23-75598, CV23-75614, CV23-75615, CV23-75618, CV23-75619, CV23-75623, CV680-0012, CV680-0025, CV680-3001, CV680-3002, CV680-3012, CV680-3016, CV680-3019, CV680-3022, CV680-3023, CV680-3026, CV680-3027, CV680-3029, CV680-3030, CV680-3031, CV680-3032, CV680-3034, CV680-3035, CV680-3036, CV680-3037, CV680-3040, CV680-3041, CV680-3042, CV680-3044, CV680-3045, CV680-3046, CV680-3049, CV680-3051, CV680-3052, CV680-3053, CV680-3089, and additional CH620, CH640, CH670, CV620, CV640, and CV670 spec-number variations. PISTON SPECIFICATIONS Piston Part Number: 25-874-54-S Bore: 80mm (3.150\") Piston Thrust Face O.D. (standard): 82.986mm (3.2671\") Compression rings: bidirectional (top and second rings) Piston pin bore I.D.: 17.006-17.012mm HOW TO CONFIRM FIT Read the model number and the spec number off the blower housing decal and match them against the fitment list above. Horsepower on its own will not identify the engine, because the same horsepower was sold on more than one block and more than one bore.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCOMPLETE REBUILD KIT FOR 80mm KOHLER COMMAND PRO TWIN ENGINES - Includes 2 standard bore pistons (25-874-54-S) with wrist pins and clips, 2 piston ring sets, complete gasket set, 2 crankshaft seals, and crankcase sealer for a full top-end overhaul. Note: connecting rods, valves, and bearings are NOT included in this kit.\u003c\/li\u003e\n\u003cli\u003eVERIFY YOUR ENGINE HAS 80mm BORE BEFORE ORDERING - This kit fits ONLY 80mm bore, 674cc Kohler Command Pro Twin engines. Kohler made CH620 and CH640 engines in both 77mm (624cc) and 80mm (674cc) versions. Check your engine nameplate for displacement (674cc) or measure the bore before ordering. If your engine is 77mm bore, this kit will NOT fit.\u003c\/li\u003e\n\u003cli\u003eCOMPATIBLE KOHLER ENGINE MODELS - Command Pro Twin 80mm bore, 674cc engines: CH22, CH23, CH620, CH621, CH640, CH641, CH670, CH680, CH682 (horizontal shaft) and CV22, CV23, CV620, CV640, CV670, CV680 (vertical shaft). All are 4-cycle OHV V-Twin engines with cast iron cylinder liners. Also fits many spec-number variations of these engines (CH680-3012, CH620-3090, CV680-3016, etc.).\u003c\/li\u003e\n\u003cli\u003eRESTORE COMPRESSION AND EXTEND ENGINE LIFE - Ideal for engines showing worn compression, oil consumption, blue smoke, or hard starting. These 22-24 HP Kohler Command Pro V-Twin engines power a wide range of commercial and residential outdoor power equipment including zero-turn mowers, riding lawn tractors, generators, pressure washers, and industrial machinery.\u003c\/li\u003e\n\u003cli\u003eWHAT TO MEASURE BEFORE THE KIT GOES ON - Measure each bore for taper and out of round before anything goes together. 80.00mm nominal is this kit; a worn or tapered bore wants boring and an oversize piston instead. Check ring end gap in the bore each ring will run in and side clearance in the groove, and hone the bore so the rings bed in. Clean the closure plate and pan faces to bare metal before sealer goes on.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009653665946,"sku":"P4-MWPI-W81N","price":289.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/71GzbaFyP-L.jpg?v=1793383274"},{"product_id":"piston-rings-for-kohler-80mm-style-b-ch23-ch670-ch680-std-e3-28xv-3sg2","title":"Piston Rings for Kohler 80mm Style B CH23 CH670 CH680 Std","description":"\u003cp\u003eStandard bore piston ring set for Kohler 674cc Command twin cylinder engines with an 80mm bore, replacing Kohler part number 24-108-26-S. This is the Style B set with a 1.2mm top ring. One set covers one cylinder, so a twin needs two. Kohler built these engines in two ring styles that are not interchangeable: Style A takes a 1.5mm top ring and Style B takes 1.2mm, and the ring grooves in the piston are machined accordingly. Measure the top ring off your old piston or look up the engine by its spec number before ordering. Note also that the CH620 and CH640 model names were used on both 624cc 77mm and 674cc 80mm engines, so the model badge alone does not establish the bore. For a cylinder already bored oversize, use the corresponding oversize set.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFITS KOHLER 674cc COMMAND TWINS WITH AN 80MM STANDARD BORE, including CH23, CH670, CH680, CH620B, CH640B and the matching CV23, CV620, CV640, CV670 and CV680. Replaces Kohler 24-108-26-S. Oil burning, blowby out the breather and a dropoff in power under load are the symptoms that bring people to a ring set.\u003c\/li\u003e\n\u003cli\u003eONE SET, ONE CYLINDER. Kohler packages these rings per piston, so a twin cylinder engine needs two sets. Order accordingly before you have the engine apart on the bench.\u003c\/li\u003e\n\u003cli\u003eSTYLE B, 1.2MM TOP RING. This is a real distinction and it is not optional. Kohler built these engines with two different ring packages: Style A uses a 1.5mm top ring, Style B uses 1.2mm. The grooves are cut to match. A 1.2mm ring dropped into a 1.5mm groove will flutter and pump oil. Pull a ring off your old piston and measure it, or look the engine up by its spec number.\u003c\/li\u003e\n\u003cli\u003eCHECK THE BORE, NOT THE MODEL NAME. CH620 and CH640 were built in both 624cc 77mm and 674cc 80mm versions. The model badge will not tell you which one you have. The spec number stamped on the engine will, and so will a bore gauge. The 77mm engines and the 83mm CH25, CH730 and CH740 both take different rings.\u003c\/li\u003e\n\u003cli\u003eSTANDARD BORE ONLY. This set is for a cylinder still at 80.00mm, within service limits and not bored oversize. Kohler's oversizes on this engine are metric, listed as .08, .25 and .50 millimeter, not in thousandths of an inch. If your cylinder has been bored, you need the matching oversize set instead.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009657270426,"sku":"E3-28XV-3SG2","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/71MbIlvM-QL.jpg?v=1793383445"},{"product_id":"kohler-80mm-style-b-rings-gaskets-seals-ch23-ch670-ch680-4j-rxha-bn8h","title":"Kohler 80mm Style B Rings Gaskets Seals CH23 CH670 CH680","description":"\u003cp\u003eRe-ring and reseal package for the 80mm Kohler twin cylinder engines. Contents: two Style B piston ring sets, one per cylinder, replacing Kohler 24-108-26-S; a complete gasket and seal set; both crankshaft seals; and a tube of crankcase sealant for the closure plate and oil pan joint. Rings and gaskets only, with no pistons supplied. Ring style matters here because the pistons stay in the engine. Kohler fitted two piston styles to this bore: Style B takes a 1.2mm top ring and Style A takes 1.5mm. Measure the old top ring or the top piston groove with a caliper before ordering. If it reads 1.5mm you need the Style A set, 24-108-18-S standard or 24-108-21-S oversize, rather than this one. Both styles went into the same engine models, so the model number cannot answer the question and the measurement can. This set is sized for the 80.00mm standard bore. Kohler's oversize steps are plus 0.08mm, plus 0.25mm and plus 0.50mm, with Style B sets 24-108-27-S, 24-108-28-S and 24-108-29-S. Fits CH23 and CV23, CH670 and CV670, CH680 and CV680, and the CH6208 and CH6408, all 674cc. The 77mm group, CH18 through CH22 and CH620 to CH641, and the 83mm group, CH25 and up, take different ring sets. Before assembly, measure the bore for taper and out of round, check ring end gap in the bore each ring will run in, and check side clearance in the groove. The top and second rings are bidirectional. These engines use hydraulic lifters, so there is no valve lash adjustment after assembly.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRE-RING AND RESEAL PACKAGE FOR THE 80MM KOHLER TWINS - Two Style B piston ring sets, one for each cylinder, replacing Kohler 24-108-26-S, plus a complete gasket and seal set, both crankshaft seals and a tube of crankcase sealant for the closure plate and oil pan joint. Rings and gaskets only. No pistons are supplied, which is why the ring thickness below has to match what is already in your engine.\u003c\/li\u003e\n\u003cli\u003eMEASURE YOUR TOP RING - 1.2MM IS THIS KIT - Kohler ran two piston styles on the 80mm bore. Style B takes a 1.2mm top ring and Style A takes 1.5mm. Put a caliper across the old top ring, or across the top groove in the piston. If it reads 1.2mm, this is your set. If it reads 1.5mm you have Style A pistons and need the Style A rings, 24-108-18-S standard or 24-108-21-S oversize. Both styles went into the same engine models, so the model number cannot answer this - only the measurement can.\u003c\/li\u003e\n\u003cli\u003eSTANDARD 80MM BORE - Sized for the 80.00mm standard bore. Kohler's oversize steps on this bore are plus 0.08mm, plus 0.25mm and plus 0.50mm, and the matching Style B ring sets are 24-108-27-S, 24-108-28-S and 24-108-29-S. If your block has been machined, order the set for the size the shop actually cut rather than this one. Measure the bore for taper and out of round before you commit to a re-ring at all, because rings will not seal a worn cylinder however carefully they are fitted.\u003c\/li\u003e\n\u003cli\u003eFITS THE 80MM KOHLER TWINS - CH23 and CV23, CH670 and CV670, CH680 and CV680, and the CH6208 and CH6408. These are the 674cc engines. The 77mm engines, CH18 through CH22 and the CH620 to CH641 group, take a different ring set, and the 83mm engines, CH25 and up, take another again. Read the model and spec numbers off the blower housing decal; horsepower alone will not get you to the right bore because the same horsepower was sold on more than one block.\u003c\/li\u003e\n\u003cli\u003eWHAT ELSE THE JOB WANTS - Check ring end gap in the bore each ring will run in, and side clearance in the piston groove, before anything goes together. Scuff the bore with a hone so the rings have a surface to bed into. The top and second rings are bidirectional, so there is no up side to get wrong, but the oil rails and expander go in in order. Clean the oil pan and closure plate faces to bare metal before the sealant goes on. These engines run hydraulic lifters, so there is no lash to set.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009660088474,"sku":"4J-RXHA-BN8H","price":139.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/719_yRQQLL.jpg?v=1793383484"},{"product_id":"complete-overhaul-kit-kohler-ch23-cv23-80mm-pistons-valves-zr-2e7s-ndia","title":"Complete Overhaul Kit Kohler CH23 CV23 80mm Pistons Valves","description":"\u003cp\u003eComplete engine overhaul kit for the Kohler CH23 and CV23, 674cc, 80mm standard bore. Contains two pistons with rings, two gasket sets, two intake valves, two exhaust valves, two valve stem seals, a breather gasket, crankshaft seals and crankcase sealer, which is everything a full teardown needs in one order. This kit is for cylinders still at standard size and within service limits; measure both bores before ordering, since a standard piston will not seal in a cylinder that has been machined oversize. Kohler built the 80mm engines with two ring packages, Style A with a 1.5mm top ring and Style B with 1.2mm, and the piston ring grooves are machined accordingly. Ring style follows the piston rather than the model number, so measure the top ring from the old piston before ordering. Note also that several Kohler Command models were produced at more than one displacement, with the 624cc engines at 77mm and the 674cc engines at 80mm, so identify the engine by its spec number rather than its badge.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFITS THE KOHLER CH23 AND CV23, 674cc, 80mm standard bore. A complete overhaul in one box rather than eleven separate orders: two pistons with rings, two gasket sets, two intake and two exhaust valves, two valve stem seals, a breather gasket, crankshaft seals and crankcase sealer. If the engine is smoking, down on compression, or has sat long enough to need everything, this is the whole job.\u003c\/li\u003e\n\u003cli\u003eVERIFY YOUR BORE, AND THIS IS NOT BOILERPLATE. Kohler built several Command models at more than one displacement. The 624cc engines are 77mm and the 674cc engines are 80mm, and CH620 and CH640 exist in both. The CH23 and CV23 are 674cc, but if you are working from a model badge alone on any Command engine, the spec number on the tag is what settles the bore. Nothing in an 80mm kit fits a 77mm block.\u003c\/li\u003e\n\u003cli\u003eCHECK YOUR RING STYLE BEFORE ORDERING. Kohler built the 80mm engines with two ring packages: Style A with a 1.5mm top ring and Style B with 1.2mm, and the piston grooves are machined to match. The style follows the piston, not the model number, so pull a ring from the old piston and measure it. Ordering the wrong style means rings that flutter and pump oil from the first hour.\u003c\/li\u003e\n\u003cli\u003eSTANDARD BORE ONLY. This kit is for cylinders still within service limits and not machined oversize. Measure both bores before ordering. If either has been bored, you need the matching oversize parts and a standard piston will not seal in it.\u003c\/li\u003e\n\u003cli\u003eTHE BREATHER GASKET AND THE SEALER ARE IN THE BOX. Those are the two pieces people discover they are missing at nine at night with the engine apart, because most overhaul kits leave them out. Hone both cylinders so the new rings have a crosshatch to bed into, check rod bearing clearance and the crank journals, and torque everything in sequence and in stages to your engine manual.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009661137050,"sku":"ZR-2E7S-NDIA","price":389.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/71MtA4iSCfL.jpg?v=1793383519"},{"product_id":"oil-pan-gasket-kohler-cv25-cv730-cv740-cv680-24-041-66-s-6h-03ki-8x04","title":"Oil Pan Gasket Kohler CV25 CV730 CV740 CV680 24-041-66-S","description":"\u003cp\u003eOil pan and crankcase cover gasket with O-ring for Kohler vertical shaft twin-cylinder engines. Replaces Kohler 24-041-66-S. SUPERSESSION. 24-041-66-S replaces the earlier 24-041-24-S and 24-041-54-S. If your parts diagram shows either of those, this is the current part. FITS. CV18, CV20, CV23, CV25, CV26, CV620, CV640, CV680, CV682, CV730, CV732, and the ECV and PCV equivalents. FIRST - DOES YOUR ENGINE TAKE A GASKET? This is the question your engine's spec number answers, and it is worth asking before you order. Kohler sealed this joint two different ways across these families. Some engines use a die-cut gasket. Others were assembled with RTV silicone sealant and no gasket at all - the service manuals for several of these families say exactly that. How to tell: look your model and spec number up in the Kohler parts lookup and see whether a gasket is listed. Or, if the engine is already apart, look at the flange - cured silicone on a bare machined face means it was built without a gasket. WHY YOU SHOULD NOT SUBSTITUTE ONE FOR THE OTHER. This joint is part of the crankshaft end play stack. A gasket is thicker than a film of sealant, and end play is a measured specification on these engines. Fit what the spec number calls for. TORQUE. 216 inch pounds, 24.4 Nm, in the numbered sequence shown in your engine manual - not around the circle. Clean both faces with a gasket-removing solvent rather than scraping them; a gouged sealing face leaks whatever you put between it. WHILE THE PAN IS OFF Crankshaft oil seal Oil pick-up O-ring Oil pump O-ring and pump screen O-ring Check crankshaft end play with the pan drawn down before final assembly A note on branding: Kohler Engines now trades as Rehlko, so packaging may carry either name.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFITS THE VERTICAL SHAFT KOHLER TWINS - CV18, CV20, CV23, CV25, CV26, CV620, CV640, CV680, CV682, CV730 and CV732, plus the ECV and PCV equivalents. Replaces Kohler 24-041-66-S, which supersedes 24-041-24-S and 24-041-54-S. Supplied with the oil pick-up O-ring.\u003c\/li\u003e\n\u003cli\u003eCHECK WHETHER YOUR ENGINE USES A GASKET AT ALL - Kohler sealed this joint two different ways. Some engines take a die-cut gasket; others were assembled with RTV silicone and no gasket. The service manuals for several of these families say plainly that RTV is used in place of a gasket. Look your model and spec number up before ordering, or look at the joint on teardown - cured silicone on a bare machined flange means no gasket.\u003c\/li\u003e\n\u003cli\u003eWHY IT MATTERS MORE THAN IT LOOKS - That joint carries part of the crankshaft end play stack. Adding a gasket where the factory used a thin film of sealant changes the standoff, and end play is a measured specification on these engines. Use what your spec number calls for rather than what is easiest to buy.\u003c\/li\u003e\n\u003cli\u003eTORQUE IS 216 INCH POUNDS - 24.4 Newton meters, in the numbered sequence in your engine manual rather than working around the circle. Clean both faces properly first. Kohler asks for a gasket-removing solvent rather than scraping, because a gouged sealing face will leak no matter what you put between it.\u003c\/li\u003e\n\u003cli\u003eWHAT ELSE COMES OFF WITH THE PAN - The crankshaft oil seal, the oil pick-up O-ring, the oil pump O-ring and the pump screen O-ring are all disturbed by this job and are all cheap. Check crankshaft end play with the pan drawn down before final assembly. Kohler engines are branded Rehlko now, so packaging may carry either name.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009662087322,"sku":"6H-03KI-8X04","price":14.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/51HfXoLxciL.jpg?v=1793383540"},{"product_id":"intake-valve-guide-and-seal-compatible-with-kohler-ch18-ch20-ch22-ch23-ff-3fm1-oeep","title":"Intake Valve Guide and Seal Compatible with Kohler CH18, CH20, CH22, CH23, CH25, CH730, CH740 Engines","description":"\u003cp\u003eKeep your engine running smoothly with this precision-engineered intake valve guide and seal set, designed specifically for CH series engines including CH18, CH20, CH22, CH23, CH25, CH730, and CH740 models. This essential component helps maintain proper valve alignment and sealing, ensuring optimal engine performance and longevity. The valve guide controls the valve stem's movement while the seal prevents oil from entering the combustion chamber, maintaining clean and efficient operation. Installation by a qualified technician is recommended to ensure proper fitment and function. This replacement part is manufactured to meet strict dimensional specifications for reliable performance in your engine.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCOMPATIBILITY: Designed to fit multiple engine models including CH18, CH20, CH22, CH23, CH25, CH730, and CH740 series\u003c\/li\u003e\n\u003cli\u003eDUAL COMPONENT: Package includes both valve guide and valve seal for complete intake valve maintenance and repair\u003c\/li\u003e\n\u003cli\u003ePRECISION FIT: Engineered to exact specifications for proper sealing and optimal engine performance\u003c\/li\u003e\n\u003cli\u003eDIRECT REPLACEMENT: Matches OEM specifications for seamless installation and reliable operation\u003c\/li\u003e\n\u003cli\u003eESSENTIAL MAINTENANCE: Helps maintain proper valve operation and prevents oil consumption issues in compatible engines\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009667788954,"sku":"FF-3FM1-OEEP","price":25.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/518Q35PZ43L.jpg?v=1793383698"},{"product_id":"80mm-rebuild-kit-with-rods-valves-fits-kohler-ch23-ch680-cv23-he-hf34-xcsm","title":"80mm Rebuild Kit with Rods Valves Fits Kohler CH23 CH680 CV23","description":"\u003cp\u003eA rebuild kit with connecting rods and valves for the Kohler 80mm, 674cc twin-cylinder engines. The kit contains two 80mm standard pistons with wrist pins and circlips (replacing 25-874-54-S), two ring sets, two connecting rods, intake and exhaust valves, the complete gasket set (head, valve cover, intake, exhaust and breather gaskets and O-rings), two crankshaft oil seals and crankcase sealer. It fits the CH22, CH23, CH620, CH621, CH640, CH641, CH670, CH680, CH682, CV22, CV23, CV620, CV640, CV670 and CV680. The CH620, CH621, CH640, CH641, CV620 and CV640 were also built as 77mm, 624cc engines, so check the displacement on the nameplate: 674cc is this kit. The engine is 80mm bore by 67mm stroke. For standard 80mm bores only; a bored cylinder needs oversize pistons. The pistons come with their own rings, so there is no need to measure the old ring grooves. Check crankpin and rod clearance, lap the valves and set valve clearance, and tighten rod and head bolts to the service manual figures.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePISTONS, RINGS, RODS, VALVES, GASKETS AND SEALS - Two 80mm standard pistons with wrist pins and clips, two ring sets, two connecting rods, intake and exhaust valves, the complete gasket set (head, valve cover, intake, exhaust and breather gaskets and O-rings), two crankshaft seals and crankcase sealer.\u003c\/li\u003e\n\u003cli\u003eFITS KOHLER 80MM, 674CC TWINS - CH22, CH23, CH620, CH621, CH640, CH641, CH670, CH680, CH682, CV22, CV23, CV620, CV640, CV670 and CV680. The CH620, CH621, CH640, CH641, CV620 and CV640 were also built as 77mm, 624cc engines, so check the displacement on the nameplate: 674cc is this kit.\u003c\/li\u003e\n\u003cli\u003eREPLACES 25-874-54-S - The standard 80mm piston, two of them, with their own matched rings, so there is no need to measure the old ring grooves.\u003c\/li\u003e\n\u003cli\u003eSTANDARD BORE ONLY - For cylinders at the 80mm standard size. A bored cylinder needs oversize pistons to match.\u003c\/li\u003e\n\u003cli\u003eWHILE IT IS APART - Check the crankpin and rod clearance before the new rods go on, lap the new valves to their seats and set valve clearance, check each bore for taper and ring end gap, and tighten rod and head bolts to the service manual figures.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lil Red Barn","offers":[{"title":"Default Title","offer_id":68009668313242,"sku":"HE-HF34-XCSM","price":499.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0397\/2346\/6909\/files\/719o86IwvOL.jpg?v=1793383751"}],"url":"https:\/\/performancesawsupply.com\/collections\/kohler-80mm-rebuild-center.oembed","provider":"Performance Saw Supply","version":"1.0","type":"link"}