"The springs work great for the 88cc and under big bore kits with the stock head. If you use an aftermarket head I would recomend a manual clutch. The eat up clutch plates."... (read full reviews)
"I installed these clutch springs in my 09 CRF450R to reduce clutch slip. They do work and totally eliminated the slipping, but are really stiff at the lever pull. After a few laps you can really"... (read full reviews)