PISTON KIT 84-90 YZ490 87.5MM, FORGED WOSSNER 8317D050

Wossner 87.50mm 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: 87.50mm


• 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-W4815.050.WO


• Wossner Part No: 8317D050

Vehicle Fitments

• Yamaha YZ490 (1984 - 1990)


• Yamaha WR500 (1992 - 1993)