PISTON KIT YZ 250F 2019 76.96 A, WOSSNER 8957DA, B7B-11631-00-00

The Wossner Forged Piston Kit (8957DA) with a standard 77mm bore is designed for the Yamaha YZ250F (2019). Engineered in Germany, this high-performance forged piston delivers strength, efficient heat transfer, and consistent load distribution. Its elliptical design minimises localised stress and helps prevent piston collapse under high-performance conditions.

Features

• Forged construction for enhanced strength and durability

• Designed for optimal combustion heat transfer to cylinder walls

• Elliptical skirt profile ensures even thrust load distribution

• Manufactured in Germany

Specifications

• Piston Size: 77mm (STD)

• Kit Part Number: 56-W8812.A.WO

• Wossner Part Number: 8957DA

• Piston Type: Forged

Cross-Reference OEM Part Numbers

• B7B-11631-00-00

Vehicle Fitments

• Yamaha YZ250F (2019)