COMET DUSTER CLUTCH. YAMAHA (W/OIL PUMP GEAR) 30MM FLUSHTAPERED BORE. CONTAINS SIX 205918 ACTIVATOR PUCKS AND 212631RED SPRING. FITS ONLY YAMAHA TWIN CYLINDER MODELS 1974-PRESENTWITH OIL PUMP DRIVE GEAR ATACHED TO FIXED FACE OF DRIVE CLUTCHAND A STANDARD 30MM TAPERED BORE. WILL NOT FIT MODELS WITHSPLINED CRANKSHAFT. BEST CLUTCH YET FOR ANY SNOWMOBILEAPPLICATION. WHEN YOU COMPARE THE COMET DUSTER TO ANY OTHERCLUTCH - EVEN INCLUDING THE 102C - THE OVERALL FEATURES OF THECOST, WEIGHT, SIMPLICITY, EASE OF MAINTENANCE, ENDURANCE ANDPERFORMANCE, NO OTHER CLUTCH CAN COMPARE. FOR USE ON ENGINESUP TO 440CC. SIMPLICITY AT ITS FINEST. PERFORMANCE AT ITS BESTTHE FINEST \"EVERYDAY\"" CLUTCH KNOWN YET FOR SNOWMOBILES. COSTSLESS THAN YOU WOULD EVER EXPECT TO PAY FOR A GOOD CLUTCH!OUTPERFORMS CLUTCHES COSTING TWICE AS MUCH. SIMPLE...INCONSTRUCTION