Primary Drive Alloy Kit & O-Ring Chain Blue Rear Sprocket for Yamaha WR250F 2011-2013

Sprocket kits include the following. Stock size Primary Drive steel front sprocket. Stock size Primary Drive Alloy rear sprocket. Stock size Primary Drive O-Ring chain. Front sprockets are manufactured to O.E.M., specs using high grade hardened steel. Rear Aluminum Sprocket made from 7075 T-6 heat treated Aluminum. Come with self cleaning grooves. The unique design and profile of the chain ensures durability, and decreases wear on chain guides and swing arm rub plates. Average tensile strength 7,850 lbs. Clip style Master-Link included.