Yamaha WR 450 F (CJ 04) [2003-2004] - WÖSSNER Pro Series forged pistons

WÖSSNER Pro Series forged pistons for Yamaha WR 450 F

The WÖSSNER Pro Series forged piston is intended as a forged aluminum version for the Yamaha WR 450 F (CJ 04) in the 2003-2004 model year range. Its technical characteristics support a targeted selection for repairing or building the right engine.

Technical execution

• Material: aluminum
• Piston type: forged
• Piston compression: highly compressed
• Diameter Ø: 94.96 mm
• Bore diameter: 95.00 mm
• Compression ratio: 13.5:1
• Rings Quantity: 2

Dimensions and labeling

The piston has a diameter of 94.96 mm and is designed for a bore diameter of 95.00 mm. The letter oversize is A. The version is marked “Oversize: STD”. This information enables comparison with the required engine dimensions and the intended piston specification.

Vehicle assignment

The forged piston is assigned to the Yamaha WR 450 F (CJ 04), built in 2003–2004. Before making your selection, please compare the diameter, bore diameter, compression ratio and the A/STD marking with the requirements of your engine.