This kit is designed for higher H.P. engines. We use YZF1000 street bike friction plates which are proven to be very durable, smooth steel plates & Toomey style springs that are 25% stiffer than stock. One of the keys to our clutch kit is the smooth steel plates. "Dimpled or textured" steel plates WILL NOT handle as much H.P or last as long as smooth steel plates. "Dimples" are concave in shape which reduces surface material causing less contact area which results in premature clutch slippage. This kit has a very stiff clutch pull and is typically only used in drag racing applications.
Posted by Steven Martinez on 16th Oct 2017
I had a so called heavy duty clutch in the bike when I did the 421 top end with all of the parts from Driveline and the clutch smoked on my second run. I bought the drag race clutch here and made 15 passes with no issues as of yet. If you are on the fence about buying this clutch or anything from Driveline, jump off and send them some money! You won't be disappointed!