PISTON KIT 81-19 PW50 40.00, 8267DA WOSSNER YAMAHA 18M-11631-00-A0

This Wossner forged piston kit is a standard-size replacement specifically designed for Yamaha PW50 models from 1981 to 2019. Crafted in Germany, it offers enhanced durability and precise engineering for small two-stroke engines, ensuring optimal fit and performance.

Features

• Forged construction for high strength and longevity

• Elliptical design provides uniform bearing surface during heat expansion

• Facilitates efficient heat transfer to the cylinder walls

• Prevents localised pressure buildup and piston collapse

• Manufactured in Germany

Specifications

• Bore Size: 40.00mm

• Actual Piston Size: 39.95mm

• Stroke: 39.20mm

• Piston Clearance: 0.05mm

• Wossner Compression Ratio: 2-stroke

• OEM Compression Ratio: 2-stroke

• Compression Height: 24.90mm

• Circlip Part Number: CW10

• Pin Part Number: WP105

• Ring Set Part Number: RSB4000

Cross-Reference OEM Part Numbers

• Part No: 56-W938+000_WO

• Cross Reference: 18M-11631-00-A0, 653M04000

Vehicle Fitments

• Yamaha PW50 (1981–2019)