Yamaha WR 250 F (RE 25) [2018] - forged pistons

PROX forged pistons for the Yamaha WR 250 F

The PROX forged piston is tailored to the Yamaha WR 250 F (RE 25) built in 2018. As a forged aluminum version, it combines a specific aluminum alloy with OEM-equivalent quality. The alloy is designed to reduce friction and support reliability.

Execution and function

The flat crown with a raised top and four valve pockets characterize the piston shape. Piston compression is specified as standard at 13.5/1. The piston is designed for a 4T engine and is therefore suitable as a suitable component for the specified engine application.

Technical data

• Brand: PROX
• Piston Type: Forged
• Material: aluminum
• Piston compression: Standard, 13.5/1
• Diameter Ø: 76.97 mm
• Letter oversize: C
• Oversize: +0.02
• Rings Quantity: Set
• Displacement version: 4T
• Specificity: Flat crown with raised top / 4 valve pockets

Vehicle assignment

The forged piston fits the Yamaha WR 250 F (RE 25), built in 2018. The vehicle assignment refers to this complete model and year range.

When making your selection, the diameter of 76.97 mm, the oversize letter C and the oversize dimension +0.02 should be taken into account in particular. These technical characteristics make it easier to compare with the intended engine structure.