WOSSNER 86mm PISTON KIT YAMAHA YZ465 1980-1981, IT465 1981-1982

This Wossner piston kit features an 86mm bore size (85.92mm actual) and is designed for Yamaha YZ465 (1981–1982) and IT465 (1980–1981) models. Manufactured in Germany, the forged piston is built for strength and efficient thermal performance. The elliptical design evenly distributes thrust loads during heat expansion, reducing localised pressure and minimising the risk of piston collapse.

Features

• Forged construction for high durability

• Elliptical profile ensures uniform load distribution under heat

• Designed for efficient heat transfer from combustion chamber to cylinder walls

• Manufactured in Germany

Specifications

• Bore Size: 86mm (85.92mm)

• Display: 465 cm³

• Stroke: 82.00 mm

• Clearance: 0.08 mm

• Compression Height: 40.00 mm

• Compression Ratio: 2-stroke (Wossner and OEM)

Cross-Reference OEM Part Numbers

• Piston Kit: 8265D100

• Lock: CW18

• Pin: WP042

• Ring Set: RSC8600

• Part No.: 56-W551_1.00.WO

Vehicle Fitments

• Yamaha YZ465 1981

• Yamaha YZ465 1982

• Yamaha IT465 1980

• Yamaha IT465 1981