DID PBR Chain Kit 520VX3 14 50 Standard Ultra Light Self Cleaning Hard Anodized Rear Sprocket By modulating the rear brake By modulating the rear brake by hand riders can confidently set up lines RFX Race Series chain rollers are manufactured to OEM specifications and use top quality polyurethane for a longer roller life and reduced chain noise Performance: Ideal for everyday use and sporty drivers who value performance and reliability The ideal chain set for anyone who wants to get the best out of their motorcycle