The 102C is 7.5 diameter for the serious competitor. Fully engaged a 1-1/4 belt will ride to the top. Modifying a 102C into the hottest clutch on the snow is as simple as changing the spring, spacers and three centrifugal weights. See the no. 212600 clutch sold less cam arms and spring for custom calibration. Universal: Without cam arms and spring. 30MM 1:10 tapered bore; accepts 1-1/4 wide belts and adjustable to 1-3/16 , 1-5/16 and 1-3/8 . This clutch fits the majority of machines, including those with engines such as Kohler, CCW (Kioritz), JLO, Hirth, Tohatsu, Kawasaki, Sachs, Kiehaefer, Mercury, Xenoah, Suzuki, Yamaha, late model Rotax (Bombardier), etc. which have a 30MM tapered crank; this is perhaps the most popular 102C. However, please note that some models of these engine makes do have alternate shapes. Ski Doo / Moto Ski: 30MM 1:10 tapered bore; accepts 1-5/16 wide belts. Limited application. This clutch is only for those Bombardier machines which are liquid-cooled and includes models such as 9500, 7500, Ultra Sonic, Super Sonic, etc. Calibration C-2 cam arms #208968 and silver spring #204818. Yamaha #208300: WITHOUT CAM ARMS AND SPRING. 30MM 1:10 tapered bore; accepts 1-1/4 wide belts and adjustable to 1-5/16 . This clutch fits Yamaha Phazer 84-90, Exciter 87-89, SRV 80-90, SRX 80, SS440 80-83 and other models. Yamaha #208301: 30MM 1:10 tapered bore; limited application. This clutch is only for those Yamaha models built from about 1974 to the present which require a gear attached to the back side of clutch... for driving oil injection system. Included among the models this clutch fits are some “GP Series models, most Exciters, etc. This Comet clutch does not interchange with, nor fit, all Yamaha “geared models. Calibration: F-2 cam arms #211333 and silver spring #204818. Yamaha / John Deere / Kawasaki #208306: 30MM 1:10 tapered bore; limited application. This clutch is only for those Kawasaki engines found as original equipment in Kawasaki brand and John Deere brand snowmobiles... and also for Yamaha SRX 1981. Calibration: B-1 cam arms #207801 and yellow spring #203475. Calibration is not necessarily suited for all applications. Setup is suitable for SRX 1981 and most Kawasaki.
