
The Story
Wossner forged piston kit designed for superior strength and performance. Engineered for optimal heat transfer to cylinder walls, ensuring efficient combustion. The elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse. Manufactured in Germany for high-quality standards.
Features
- Forged piston for enhanced strength and durability
- Optimized heat transfer for efficient combustion
- Elliptical design to prevent piston collapse
- Manufactured in Germany
Specifications
- Bore Size: 69.50mm
- Actual Bore Diameter: 68.94mm
- Displacement: 246 cm³
- Stroke: 68.00mm
- Clearance: 0.06mm
- Wossner Compression Ratio: 2-Stroke
- OEM Compression Ratio: 2-Stroke
- Compression Height: 35.80mm
- Theoretical Weight: Not specified
Included Components
- Lock Part Number: CW18
- Pin Part Number: WP033
- Ring Set Part Number: RSB6950 x 2
Vehicle Fitments
- Yamaha IT 250 (1983)
- Yamaha Tri-Z 250 (1985-1989)

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
Wossner forged piston kit designed for superior strength and performance. Engineered for optimal heat transfer to cylinder walls, ensuring efficient combustion. The elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse. Manufactured in Germany for high-quality standards.
Features
- Forged piston for enhanced strength and durability
- Optimized heat transfer for efficient combustion
- Elliptical design to prevent piston collapse
- Manufactured in Germany
Specifications
- Bore Size: 69.50mm
- Actual Bore Diameter: 68.94mm
- Displacement: 246 cm³
- Stroke: 68.00mm
- Clearance: 0.06mm
- Wossner Compression Ratio: 2-Stroke
- OEM Compression Ratio: 2-Stroke
- Compression Height: 35.80mm
- Theoretical Weight: Not specified
Included Components
- Lock Part Number: CW18
- Pin Part Number: WP033
- Ring Set Part Number: RSB6950 x 2
Vehicle Fitments
- Yamaha IT 250 (1983)
- Yamaha Tri-Z 250 (1985-1989)




















