Heavy Hitter 420 Primary Chain Drive Conversion Kit GritShift This extra movement creates excess

This extra movement creates excess heat which can cause chain failure sooner

The Heavy Hitter billet unit is machined from 7075 aluminum with a black anodized finish for lasting durability

A direct upgrade over OEM lighting for night riding

Genuine RK 219 replacement primary chain

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Heavy Hitter 420 Primary Chain Drive Conversion Kit GritShift This extra movement creates excessThe Heavy Hitter 420 Primary Chain Drive Conversion Kit is the lightest 420 primary kit on the market for the Sur Ron LBX, Segway X160 X260, E Ride Pro, Ventus ONE+, and 79Bike Falcon platforms. Built for riders who have pushed stock belts past their limits with upgraded motors and controllers. Pairs a 7075 T6 billet aluminum rear sprocket with a nitrided 52100 tool steel front sprocket and a Japanese non O ring chain for maximum efficiency and long