Wossner Piston Yamaha YZ450F 03-04 / WR450F 03-11 (Pro) (Hi-Comp) Category_IRS Kits This kit ONLY fits RSV4

This kit ONLY fits RSV4 engine numbers HIGHER than 3413 with KOKUSAN flywheels

Dual-layer polymer lens provides permanent anti-fog functionality

Sold Secure Motor Scooter Silver approved

You must re-install your original connector and grommet (see picture)

Aerodynamic design minimizes wind drag and enhances stability

Wossner Piston Yamaha YZ450F 03-04 / WR450F 03-11 (Pro) (Hi-Comp) Category_IRS Kits This kit ONLY fits RSV4Wossner is Germany's finest aftermarket forged piston and rod manufacturer and have over 25 years of experience in the high performance racing industry. Top European racers and FIM World Champions rely on Wossner for only the best pistons, rods and customer service. Features In house designed and manufactured; all forgings are produced in Wossner's company owned forging operation 4 stroke pistons are made using a double bridged forging design