420/500/520 Primary 40% Reduction

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  • Regular price $700.00


This is our 40% billet gear reduction for foot-shift and standard ES machines. We highly recommend running our stiffer stage 1 clutch springs with this reduction.

*Add our "420/500/520 Master Kit" to your order to get everything necessary for a professional headache free install. The master kit is for the do-it-yourselfer and includes ALL the recommended extra parts. Includes stage 1 clutch springs, front output shaft seal, gasket maker and centrifugal clutch puller. The master kit can be found under the 420-520 sections and the "Parts" section of the website. 

**DOES NOT FIT DCT (AUTO+ES) MODELS

**2005-2011 FOREMAN 500 REQUIRES SOME CASE CUTTING

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