PISTON KIT YAMAHA YZ 65 2018-2020, WOSSNER 8306DB, 43.50mm

This Wossner piston kit is designed for Yamaha YZ 65 models from 2018 to 2019. With a bore size of 43.51mm and a +0.01mm oversize, this forged piston offers a precise fit, excellent strength, and reliable heat management. Manufactured in Germany, it is ideal for maintaining engine performance and durability under competitive riding conditions.

Features

• Forged high-performance piston with skirt coating

• Engineered for effective heat transfer from combustion chamber to cylinder walls

• Elliptical design ensures uniform bearing surface under thermal expansion

• Distributes thrust loads evenly and minimises localised pressure

• Prevents piston collapse under high stress

Specifications

• Bore size: 43.51mm

• Oversize: +0.01mm

• Country of manufacture: Germany

Cross-Reference OEM Part Numbers

• Wossner 8306DB

• 56-W9991.B.WO

Vehicle Fitments

• Yamaha YZ 65 2018–2019