*Sprocket kits include the following: *Stock size Primary Drive steel front sprocket. *Stock size Primary Drive Alloy rear sprocket. *Stock size Primary Drive Gold X-Ring chain. *Front sprockets are manufactured to OEM specs using high grade hardened steel. *Rear Aluminum Sprocket made from 7075 T-6 heat treated Aluminum. *Come with self-cleaning grooves. *All match original equipment exactly for perfect fit and size.