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DirtyBike RK GB420MXU Primary Chain Drive Kit | Surron Light Bee, Segway X160/X260
DirtyBike Primary Drive System With RK 420 GB MXU Chain – The Best Sealed 420 Chain Available Don’t risk your stock belt failing in the middle of a ride — inst
Product Overview
DirtyBike Primary Drive System With RK 420 GB MXU Chain – The Best Sealed 420 Chain Available
Don’t risk your stock belt failing in the middle of a ride — install a DirtyBike primary chain drive system. With the world famous RK 420 GB MXU chain, this is a necessary upgrade for the serious off-road rider and maintains stock gear ratio.
RK GB 420 MXU Sealed chain is one of the strongest and quietest 420 chains available. Master link makes for easier installation and the chain can be replaced easily without removing the swing arm.
Kit comes with DirtyBike exclusive 1mm aluminum alignment shim allowing you to adjust the sprocket alignment for a quieter, longer lasting drive system.
Installation Video
Buyers and Maintenance Guide
Installation Tool
Recommendations
Recommend
Use
219H standard chain
On road and light off road with stock power
219H RK O-ring and non-O-ring kits
On road and off road up to 16Kw
420 with sealed x-ring
Off road over 16Kw
420 with non-O-ring chain
Racing only. Very Loud!
Technical Specifications
| Brand | eDirtyBike |
|---|---|
| SKU Identifier | sku-45662659871030 |
| Warranty Term | 2 Years Limited Warranty |
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Surron Freight & Warranty Guarantee
Shipping Policies
E-bikes ship with specialized heavy freight ground carriers in custom reinforced double-walled protective cartons. Delivery typically completes in 3–5 business days. Free shipping applies automatically to all orders over $500.
2-Year Limited Warranty
Surron electric bikes carry an extensive 2-year warranty covering frame integrity, motor internals, and electronic controllers against manufacturing defects. Battery packs are guaranteed to retain at least 70% capacity through 500 charge cycles.
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