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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
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