We carry 520 sprocket kits from the top manufacturers such as Driven Racing, Drive Systems, Supersprox and Vortex Racing.  Whether you are looking for aluminum or lightened steel rear sprockets, we have what you need. If you want to read about the benefits of r 520 sprocket conversion kit, click the link below.

https://www.moto-madness.com/Vortex-520-Sprocket-Chain-Conversion-Kit-AFAM-Driven-Drive-Systems.html