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

WÖSSNER Pro Series forged pistons for Yamaha WR 250 F

The WÖSSNER Pro Series forged piston is intended as a forged aluminum version for the Yamaha WR 250 F (RE 25), built in 2018. The vehicle assignment enables a targeted selection for this model and this complete year range.

Design and technical features

• Piston type: forged
• Material: aluminum
• Specificity: forged double bridge
• Diameter Ø: 76.96 mm
• Bore diameter: 77.01mm
• Letter oversize: B
• Oversize: +0.01
• Compression ratio: 13.7:1
• Number of rings: 2

The dimensions, the marking B and the specified oversize +0.01 support the correct assignment of the piston to the intended engine configuration. The diameter is 76.96 mm, while the bore diameter is stated as 77.01 mm.

Vehicle assignment

Suitable for the Yamaha WR 250 F (RE 25), built in 2018. Before making your selection, please compare the model name, year of manufacture and the listed dimensions and design features with the existing engine.

Technical note

The forged double bridge, the compression ratio of 13.7:1, the number of rings 2 and the dimensions are particularly relevant for the selection. The piston is described as a single engine component.