Yamaha YZ 250 F (CG 40) [2019-2021] - 4-stroke forged piston kit - ø77.00mm

WISECO forged piston kit for Yamaha YZ 250 F

The WISECO 4-stroke forged piston kit is designed for the Yamaha YZ 250 F (CG 40) built between 2019 and 2021. The forged aluminum piston offers a defined design for the upper engine range and is suitable for replacement within this vehicle classification.

Technical features

• Piston type: forged
• Material: aluminum
• Piston compression: standard
• Diameter Ø: 76.96 mm
• Letter oversize: B
• Oversize: +0.01
• Compression ratio: 13.8:1
• Piston Ring Quantity: Set
• Version: 4T

The compression ratio of 13.8:1 and the standard piston compression make the key technical data transparent for the targeted selection of a suitable replacement piston. The diameter of 76.96 mm as well as the marking B and the oversize of +0.01 support the exact assignment when overhauling the engine.

Vehicle assignment

The kit is intended for the Yamaha YZ 250 F (CG 40), built between 2019 and 2021. Before making your selection, please compare the vehicle name, the complete year of manufacture and the technical piston data with your engine.

WISECO quality for racing

WISECO develops, forges and processes its pistons in its own manufacturing facility in Mentor, Ohio, USA. The manufacturer specializes in forged high-performance pistons for motorcycles and other motorsport applications.