Wossner 89.00mm forged piston kit is designed for durability and high performance. Engineered to optimize heat transfer and ensure uniform bearing surface expansion, it minimizes localized pressure and distributes thrust loads evenly, preventing piston collapse. Manufactured in Germany, this piston kit is built for reliability and precision.

Features

• Forged piston for superior strength and durability


• Optimized heat transfer for efficient combustion


• Elliptical design ensures even pressure distribution


• Manufactured in Germany

Specifications

• Bore Size: 89.00mm


• Actual Bore: 88.94mm


• Displacement: 349cc


• Stroke: 64.00mm


• Piston Clearance: 0.06mm


• Compression Ratio: 10.00:1 (OEM)


• Dome Volume: +13.60cm³


• Compression Height: 26.50mm

Included Parts & Part Numbers

• Lock: CW22


• Pin: WP017


• Ring Set: 890XSY

Vehicle Fitments

• KTM 350 LC4 (1992-1994)


• KTM 400 LC4 (1997)