Vendor: GritShift
Heavy Hitter 420 Primary Chain Drive Conversion Kit
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Description
The 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 life.
Fitment:
- Sur Ron LBX / S (2017-2025 Year Models Only)
- Segway X160 / X260
- E Ride Pro S / SS / 2.0
- E Ride Pro 3.0 / 4.0 / SR (MUST Use Surron Side Outwards)
- Ventus ONE+ (NON SPLINE SHAFT MOTORS)
- 79Bike Falcon Pro / GT (NON SPLINE SHAFT MOTORS)
Download Tech Sheet (Assembly & Torque Specs)
NOTE: EBMX XLB Series Motors MUST be properly shimmed or you will have side wear to the sprockets. When installing, chain tension must be loose never tight. Any chain drive should have loose chain tension. Installation and detailed setup info here.
No rubber dampers means no efficiency loss, no extra heat, and no debris shelf for chain links to pack into. Maintains OEM gear ratio and motor alignment. Precision machining extends sprocket life and keeps performance smooth at high RPM. This kit is louder than a belt no avoiding that but no louder than any other chain kit. Master link included for easy chain swaps. Mounting bolts for the 30T sprocket are not included; reuse the OEM bolts.
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