Yamaha WR 250 F (CG 36) [2015] - forged pistons

PROX forged piston Ø76.96 for Yamaha WR 250 F

The PROX forged piston is designed as a replacement piston in equivalent original equipment quality for the Yamaha WR 250 F (CG 36), built in 2015. Its forged aluminum design is based on a special alloy and manufacturing process used by most manufacturers.

Function and execution

The patented surface treatment helps reduce friction in the cylinder. The flat crown with raised top part and 4 valve pockets is tailored to the specified engine version. The piston has a standard compression of 13.5:1.

Technical data

• Brand: PROX
• Piston Type: Forged
• Material: aluminum
• Diameter Ø: 76.96 mm
• Letter oversize: B
• Oversize: +0.01
• Piston compression: standard
• Standard compression: 13.5:1
• Rings Quantity: Set
• Stroke: 4T
• Specificity: Flat crown with raised top / 4 valve pockets

Vehicle assignment

Suitable for the Yamaha WR 250 F (CG 36), built in 2015. The assignment refers to this model and this complete year range.

Selection note

When making the selection, the piston diameter of 76.96 mm, the marking B and the oversize +0.01 must be taken into account in particular. The technical features should be compared with the specifications of the engine before assembly.