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

PROX forged pistons for the Yamaha WR 250 F (CG 36), built in 2015

The PROX forged piston is designed for replacement on the engine of the Yamaha WR 250 F (CG 36) from 2015. As a forged piston made of aluminum, it combines the defined design with manufacturing in equivalent original equipment manufacturer quality.

Function and execution

The patented surface treatment supports reduced friction in the cylinder. The flat crown with raised top part and 4 valve pockets is tailored to the specified piston geometry. The default compression is 13.5:1.

Technical data

• Brand: PROX
• Piston Type: Forged
• Material: aluminum
• Diameter Ø: 76.95 mm
• Piston compression: standard
• Standard compression: 13.5:1
• Letter oversize: A
• Oversize: STD
• Rings Quantity: Set
• Stroke: 4T
• Specificity: Flat crown with raised top / 4 valve pockets

Vehicle assignment

The forged piston fits the Yamaha WR 250 F (CG 36), built in 2015. The selection is based on the vehicle model, the complete year of manufacture and the diameter Ø of 76.95 mm.

Selection guide

The standard version STD, the letter A, the piston geometry and the 4T engine variant are particularly important for the assignment. This means that the piston can be selected specifically for the specified Yamaha WR 250 F.