Made from 3mm thick High Carbon British Spring steel and coiled as tight as possible on some custom spring tooling to get maximum strength! Coated with a think heat resistant paint to prevent fade over time Provides 10,000+rpm on FS Steel Clutch Shoes.

 

Will be over 11,000rpm on a High response Stock Clutch CY/Zen shoes.

 

NOT suited to big bore engines (too high engagement rpm - will cause excess slip on taller gears and not required for big engines anyway)

BLACKBONE 10,000rpm 54mm CLUTCH SPRING

£15.95Price