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.

 

The spring is too thick to fit on fiber CY or Zenoah shoes.  You must use FS clutch 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

$19.95 Regular Price
$17.96Sale Price
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