420 Primary Belt to Chain Conversion Kit | 420 RK | Surron LBX
420 Primary Belt to Chain Conversion Kit | 420 RK | Surron LBX
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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.
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! |

Please be aware that many electric bikes sold by RegenRides, its partners, and wholesalers are intended exclusively for off-road use at their speed and power factory setting. Bypassing or modifying the bike restrictions does not adhere to proper use and as the owner, you will assume full responsibility and liability. It is important to acknowledge that these vehicles may not adhere to specific national, federal, provincial, and/or local laws or regulations.
As the buyer, it is your responsibility to thoroughly acquaint yourself with any potential restrictions that may apply to the usage of such a product in your specific location. You assume complete liability for the choices you make regarding its utilization and any potential ramifications that may arise as a result.
This vehicle is not an "electric assisted bicycle" as defined by North Carolina Motor Vehicle Code and is instead a type of motor vehicle and subject to applicable motor vehicle laws if used on public roads or public lands. Your insurance policies may not provide coverage for accidents involving the use of this vehicle. To determine if coverage is provided you should contact your insurance company or agent.