Yamaha WR 450 F (CJ 07) [2005] - forged pistons

PROX forged pistons for Yamaha WR 450 F (CJ 07), built in 2005

The PROX forged piston is tailored to the Yamaha WR 450 F (CJ 07), built in 2005. Its special alloy reduces friction and thereby supports reliable function in the engine. As a forged aluminum version, the piston combines the specified design features with standard piston compression.

Technical features

• Material: aluminum
• Piston Type: Forged
• Piston compression: standard
• Diameter Ø: 94.96 mm
• Letter oversize: B
• Oversize: +0.01
• Rings Quantity: Set
• Stroke: 4T
• Specificity: hollow piston / 5 valve pockets

Vehicle assignment

The forged piston is intended for the Yamaha WR 450 F (CJ 07) built in 2005. The assignment refers to this model type and this complete year range.

Selection and execution

The piston diameter of 94.96 mm, the oversize +0.01 and the code letter B are decisive for the selection. The design as a hollow piston with 5 valve pockets describes the specific piston design. The value “4T” indicates the specified stroke version.