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

PROX forged pistons for Yamaha WR 250 F (RE 25), built in 2018

The PROX forged piston is designed for the Yamaha WR 250 F (RE 25) built in 2018. Its forged aluminum design uses a specific aluminum alloy that reduces friction and supports reliability. The quality corresponds to the OEM standard and is therefore suitable as a precisely defined solution for the upper engine range.

Function and execution

The flat crown with raised top and 4 valve pockets is tailored to the specified engine configuration. As a 4T piston, the component combines the specified dimensions with a standard piston 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, 13.5/1
• Displacement version: 4T
• Piston rings: set
• 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. When making the selection, the diameter of 76.96 mm, the oversize letter B and the oversize specification +0.01 must be taken into account.

Factual note

Before ordering, the vehicle model, year of manufacture and the specified piston dimensions should be compared with the existing engine. The standard compression and the version for 4 valve pockets support a targeted allocation within the vehicle configuration mentioned.