Athena Yamaha YZ85 Big Bore Kit - 112cc - Includer Cylinder, Piston, Stroker Crank Shaft and Cylinder Head

Athena 2002-2017 YZ85 Big Bore Kit - 112cc - Includer Cylinder, Piston, Gaskets, Stroker Crank Shaft and Cylinder Head   *****Bolt on Kit****** 

Athena will help your 02-17 Yamaha YZ85 Make Big Power Gains. Everything needed is in one Kit. The kit includes a New Nickel-Carbide Coated Cylinder with larger water Jacket to increase cooling. Forged coated 53mm piston with  long stroke crank shaft. New cylinder head with studs and head bolts, with top end gasket kit. 

Features of the Athena YZ85 Big bore kits (112cc)

• Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets
• Forged piston with molybdenum coating
• Special gasket kit
• Easy-to-follow step-by-step installation instructions
• All are bolt-on; no machining required
• Fitment 2002-2017 Yamaha YZ85