Yamaha YZ 450 F (CJ 03) [2003] - WÖSSNER Pro Series forged pistons

WÖSSNER Pro Series forged pistons for Yamaha YZ 450 F

The WÖSSNER Pro Series forged piston is designed for the Yamaha YZ 450 F (CJ 03) built in 2003. Its aluminum design and forged piston design combine the verified design features of this engine component into a clearly defined specification.

Technical features

• Material: aluminum
• Piston Type: Forged
• Piston compression: high compression
• Diameter Ø: 94.97 mm
• Bore diameter: 95.01mm
• Compression ratio: 13.5:1
• Rings Quantity: 2

Design and dimensions

The piston is marked as oversize with the letter B. The specified oversize is +0.01. The marking B as well as the mentioned diameters and the compression ratio are therefore decisive for the selection. The “high compression” version describes the specified piston compression, while the compression ratio is specified as 13.5:1.

Vehicle assignment

Suitable for Yamaha YZ 450 F (CJ 03), built in 2003. The vehicle assignment refers to this model type and this complete year range.

Factual note

Before making your selection, please compare the dimensions 94.97 mm and 95.01 mm as well as the oversize marking B with the intended motor configuration. This allows the defined design of the WÖSSNER forged piston to be specifically assigned.