DirtyBike 420 Primary Belt to Chain Conversion Kit

DirtyBike Industries primary drive system uses a RK GB420MXU sealed chain to minimize drag and reduce chain noise giving you a longer lasting drive system.

If you ride in dusty, sandy or muddy conditions you may have primary belt slippage which will eventually fail the stock primary belt, possibly leaving you stranded in the middle of nowhere. Don’t let this happen! Install a DirtyBike Industries primary chain drive system. With a much stronger chain, this is a necessary upgrade for the serious off-road rider and maintains stock gear ratio.

RK GB420MXU 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.

This kit comes with db DirtyBike Industries 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