This clutch has a 1″ bore with 1/4″ keyway
#35 has a 12T sprocket
#41 has a 10T sprocket
Product Specs:
Drum dimensions: 1.3″ (Thick) x 4.7″ (Dia.)
Hub Total Length: 3″
1″ Bore Hub Length: 1-1/2″
1/2″ Through Hole Length: 1-1/2″
**There are many variables that play into the performance of a clutch. Tire size, rear sprocket size and rear drive set-up are a few of the main variables that could affect clutch performance. If you are using large tires or a small sprocket, your vehicle may require a belt drive system. Clutch performance is not based solely on the engine size.**