Seller notes

You are bidding on a Brand new ATHENA 478CC BIG BORE Cylinder kit for A YAMAHA YZ450F, years 03-05!! Will give greater cooling capacity and increased horsepower and torque. This kit is a TRUE BOLT ON, comes complete with A new Cylinder! Simply bolt it up! Keep all your orginal parts! Comes with the following: Aluminum cylinder with a nickel carbide coating designed with wider water jackets Forged piston with a moly coating Rings Clips Wrist pin 12.4:1 compression Runs on Pump Gas Top End Gasket ...

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