DirtyBike Provides The Best Primary Chain Drive Systems In The Industry. Our Belt To Chain Conversion Kit are super durable and will operate more reliably and last longer than the stock belt system.

We do not offer a 520 size chain for any bike and there is a very good reason. 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.