Yamaha YZ 250 F (CG 40) [2019-2021] - WÖSSNER Pro Series forged pistons

WÖSSNER Pro Series forged pistons for Yamaha YZ 250 F

The WÖSSNER Pro Series forged piston is designed for the Yamaha YZ 250 F (CG 40) from the entire 2019-2021 model year range. The piston is manufactured in Germany by specialists in 2- and 4-stroke engine parts and has an anti-friction coated shaft.

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 fits the Yamaha YZ 250 F (CG 40), built between 2019 and 2021. The diameter of 76.97 mm, the bore diameter of 77.01 mm and the oversize +0.01 with the letter B are particularly relevant for the selection.

Scope of delivery

The scope of delivery includes the rings, locking rings and the axle. The version with anti-friction coated shaft and forged construction combines the specified piston features with the specified vehicle assignment.