
The Story
Wossner 89.02mm 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: 89.02mm
- Actual Bore: 88.96mm
- 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)

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
Wossner 89.02mm 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: 89.02mm
- Actual Bore: 88.96mm
- 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)




















