〡19mm Bore 10T Engine Centrifugal Clutch 3/4 40/41/420 Chain For Go Kart ATV
A worn out chain will stretch, causing the rollers to ride on top of the teeth of the chain. Two things happen at this point you will prematurely wear down the teeth of the clu. Common clutch for 8 h-p engines using #40/41/420 chain.