420/500/520 40% Master Kit

  • Sale
  • Regular price $900.00
  • 3 available


The website automatically displays the more expensive billet basket option, use the option box above to choose the cheaper cast basket option.

**Price includes a $175 core charge on the aluminum clutch basket. Please send in your stock basket and include a copy of the original purchase receipt for the $175 core refund.

This is our billet 40% gear reduction MASTER KIT for foot-shift and standard ES machines. This kit is for the do-it-yourselfer and includes ALL the parts and special puller needed for a headache-free install; reduction, stage 1 springs, front seal, gasket maker and centrifugal clutch puller.


**ES models will need an ES module to prevent electronic shift issues. ES modules are located in the 420/500/520 sections and "Parts" section of the site.