YAMAHA YZ 250 FX [2019-2025] - WÖSSNER Pro Series forged pistons

WÖSSNER Pro Series forged pistons for the YAMAHA YZ 250 FX

The WÖSSNER Pro Series forged piston is designed as a high-compression version for the YAMAHA YZ 250 FX from the 2019-2025 model year range. The piston is made of aluminum and is forged. Its anti-friction coated shaft complements the design features for use in the 2T engine.

Technical features

• Material: aluminum
• Piston Type: Forged
• Piston compression: high compression
• Diameter Ø: 76.97 mm
• Letter oversize: B
• Oversize: +0.01
• Bore diameter: 77.01mm
• Compression ratio: 14.2:1
• Rings Quantity: 2
• Stroke: 2T
• Specificity: Double forged bridge / 3D crown / with gas connection

Vehicle assignment

The forged piston is assigned to the YAMAHA YZ 250 FX in the full year range 2019-2025. The diameter of 76.97 mm, the bore diameter of 77.01 mm, the letter B and the oversize +0.01 version are particularly relevant for the selection.

Scope of delivery

The delivery includes the forged piston with ring(s), circlip(s) and axle. Wössner forged pistons are manufactured in Germany by specialists in 2- and 4-stroke engine parts.