83mm +0.08mm Ring Set Style B 1.2mm Fits Kohler CH25

One Style B piston ring set for the Kohler 83mm twin-cylinder engines, 725cc and 747cc, for one cylinder; a twin needs two. The set has a 1.2mm top compression ring, a second ring and a three-piece oil ring. These are the +0.08mm step (about .003 inch, sometimes written +.008), the smallest ring oversize, for a standard bore with light wear where a standard set leaves the end gap wide; a bored cylinder needs the set for the size it was cut to. It replaces 25-108-02-S. Rings only: pistons, gaskets and seals are not included. The rings must match the grooves of the pistons being kept: Style B takes a 1.2mm top ring and Style A takes 1.5mm, so measure the old top ring or the top groove before ordering. It fits the CH25, CH26, CH27, CH730, CH735, CH740, CH745, CH750, CV25, CV26, CV27, CV724, CV725, CV730, CV740, CV745, CV750, KT715, KT725, KT730, KT735, KT740, KT745, SV710 to SV840, LH755 and LH775. Rings will not seal a scored, glazed or out-of-round bore, so measure taper and out of round, hone lightly for a crosshatch and check the end gap of each ring in its bore before assembly.

• ONE +0.08MM STYLE B RING SET - The set has a 1.2mm top compression ring, a second ring and a three-piece oil ring. One set does one cylinder; a twin needs two. Rings only: no pistons, gaskets or seals.
• STYLE B ONLY - Rings must match the grooves of the pistons you are keeping. Style B takes a 1.2mm top ring and Style A takes 1.5mm. Measure the old top ring or the top groove before ordering.
• REPLACES 25-108-02-S - Also written 25 108 02-S. If your parts list shows it for your engine, this set covers it.
• FITS KOHLER 83MM TWINS - CH25, CH26, CH27, CH730, CH735, CH740, CH745, CH750, CV25, CV26, CV27, CV724, CV725, CV730, CV740, CV745, CV750, KT715, KT725, KT730, KT735, KT740, KT745, SV710 to SV840, LH755 and LH775. Plus 0.08mm (about .003 inch) is the smallest ring oversize, for a standard bore with light wear where a standard set leaves the end gap wide.
• CHECK 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.