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eDirtyBike

Primary Belt to Chain Conversion Kit | 420 RK MXU | Bonnell 805

Primary Belt to Chain Conversion Kit | 420 RK MXU | Bonnell 805

$111.00 USD
$111.00 USD
Sale Sold out
Shipping calculated at checkout.

In stock

Shipping & returns

Shipping is calculated at checkout by size and destination. Most in-stock gear ships within a few business days; large freight items (campers, racks, bumpers) are made to order. Wrong fitment? Send it back within 30 days — we'll help you find the part that does fit.

Fitment & build help

Not sure if this fits your platform? Tell us your year, make, model, and trim — we'll confirm before you order. For bigger builds, we'll help you plan the full stack.

Warranty

Every product on this site ships through authorized channels with full manufacturer warranty. If something breaks in normal use, we'll help you get it resolved.

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Bonnell 805 Primary Chain Drive Kit With 420 RK MXU Sealed Chain

If you are running your rocket ship 805 in high power mode a lot, you will fail a belt soon! Replace the stock belt and pulleys with a DirtyBike Chain drive kit!

  • Strong and reliable RK chain
  • Hardened steel sprockets
  • Easy Maintenance
  • Similar To Stock Gear Ratio
  • Chain can be replaced without removing the swing arm

There is a good reason that we do not offer a 520 size chain for this bike. Over the same size sprocket a larger chain will create more heat because the larger links have to articulate considerably more that a smaller chain. This extra movement creates excess heat which can cause chain failure sooner. 

Aligning the mid shaft shaft and swing arm will be much easier with the DirtyBike Ultra Bee Swingarm Alignment Tool! 

 

Swingarm alignment tool

Buyers and Maintenance Guide

Apogee Performance Chain Lube

  • Ships from San Diego

    We ship from our San Diego dealer network. Most in-stock gear goes out within a few business days — shipping's calculated at checkout by size and destination.

  • Wrong fitment? We make it right.

    If a part doesn't fit your platform the way it should, send it back. We handle the return and find you the part that does.

  • Authorized dealer support

    Every product moves through proper channels. Full manufacturer warranty, real tech support — no gray-market headaches.