Yamaha WR 450 F (CJ 12) [2007] - forged pistons

PROX forged pistons for the Yamaha WR 450 F

The PROX forged piston is designed for the Yamaha WR 450 F (CJ 12) built in 2007. Its special alloy supports low-friction function and thus contributes to high reliability in engine operation. The forged aluminum version is designed as a replacement component for the upper engine area.

Technical features

• Material: aluminum
• Piston Type: Forged
• Piston compression: standard
• Diameter Ø: 94.95 mm
• Letter oversize: A
• Oversize: STD
• Piston ring quantity: set
• Stroke: 4T
• Specificity: hollow piston / 5 valve pockets

Vehicle assignment

The forged piston fits the Yamaha WR 450 F (CJ 12), built in 2007. In addition to the vehicle and year of manufacture, the diameter of 94.95 mm, the standard compression and the markings “A” and “STD” must be taken into account when making the selection.

Version for the engine structure

The combination of forged aluminum piston, standard compression and hollow piston with 5 valve pockets describes the specific design of this PROX piston. The 4T displacement type and the version as a set for the piston ring quantity make it easier to clearly assign them within the engine range.