Aprilia RS 660 2020> AFAM Race 520 Pitch Chain & Sprocket KitAFAM 520 Race Conversion Chain Kits are the lightweight race alternative to the stock 525 kits. Putting a new chain on a machine with worn sprockets will rob you of power and quickly wear out the chain. AFAM Chain Kits eliminate this problem and are more economical than purchasing all the pieces separately. The kit has the correct length of chain for your application, a master link (rivet), front sprocket and rear sprocket. Kit contains: 1 AFAM 520