Wossner 88.50mm forged piston kit is designed for strength and durability. Engineered for optimal heat transfer, it ensures efficient cooling of the combustion chamber. The elliptical design provides a uniform bearing surface, reducing localized pressure and distributing thrust loads evenly to prevent piston collapse. Manufactured in Germany for precision and reliability.

Features

• Forged construction for enhanced strength and longevity


• Optimized heat transfer for improved engine performance


• Elliptical design prevents piston collapse and ensures even load distribution


• Manufactured in Germany for high-quality standards

Specifications

• Bore Size: 88.50mm


• Stroke: 82.00mm


• Compression Height: 40.00mm


• Number of Rings: 2


• Clip Part Number: CW18


• Pin Size: 18mm


• Pin Part Number: WP042


• Cylinders: 1


• Compatible Needle Bearing: N1022

Cross-Reference OEM Part Numbers

• Part No: 56-W4815.150.WO


• Wossner Part No: 8317D150

Vehicle Fitments

• Yamaha YZ490 (1984 - 1990)


• Yamaha WR500 (1992 - 1993)