PISTON KIT YAMAHA YZ 65 2018-2020, WOSSNER 8306DA, 43.50mm BR8-11631-01-A0

This Wossner piston kit is designed for Yamaha YZ 65 models from 2018 to 2020. Featuring a standard bore size of 43.50mm, this forged piston delivers high strength, precise fitment, and excellent thermal stability. Manufactured in Germany, it is built to withstand the rigors of competitive riding and high engine loads.

Features

• Forged high-performance piston with skirt coating

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

• Elliptical design ensures a uniform bearing surface under thermal expansion

• Even distribution of thrust loads minimises localised pressure

• Prevents piston collapse under high-stress conditions

Specifications

• Bore size: 43.50mm

• Piston size 43.45mm

• Size: Standard

• Country of manufacture: Germany

Cross-Reference OEM Part Numbers

• Wossner 8306DA

• 56-W9991.A.WO

• BR8-11631-01-A0

Vehicle Fitments

• Yamaha YZ 65 2018–2020