Rear Sprocket 40T (Yamaha) $ 95.00 SKU: 5KE-25440-10 Genuine Yamaha 40T rear sprocket Back to: Transmission and Driveline ×Close Afam Sprockets and chains. http://www.afam.co.jp/ Description Genuine Yamaha product. ( Made by Afam for Yamaha ) This is the later sprocket with the 68mm pitch between the holes. Will suit 2001 model rear wheel and later.