Yamaha WR 426 F (CJ 02) [2001-2002] - forged pistons

PROX forged piston for Yamaha WR 426 F (CJ 02)

The PROX forged piston is assigned to the Yamaha WR 426 F (CJ 02) in the full year range 2001-2002. Its design as a forged aluminum piston provides a precisely defined basis for work on the upper engine area. Standard piston compression supports selection for stock engine configuration.

Technical features

• Brand: PROX
• Piston Type: Forged
• Material: aluminum
• 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

Intended for the Yamaha WR 426 F (CJ 02), built between 2001 and 2002. This assignment serves as a selection aid for checking the appropriate piston diameter and the specified oversize.

Factual selection aid

The diameter of 94.96 mm, the oversize letter B and the oversize +0.01 should be compared with the engine dimensions before ordering. The design with a hollow piston and 5 valve pockets is identified as a specific design feature for this application. The information “Stroke: 4T” describes the stored version for a 4T engine.