Sprocket Tooth Count & Chain Pitch
This is a 10 tooth sprocket and fits all #40, #41, and #420 motorcycle chains.
Clutch Shaft Diameter
Our clutch fits all 5HP through 7HP generator style engines from brands like Predator, Tillitson, Lifan, Zongshen, and many others. The shaft size these fit on are measured at a diameter of 19mm or ¾ inch. The clutch itself has a built-in keyway to hold the clutch in place on the shaft.