Wossner forged piston kit designed for superior strength and durability. Engineered for optimal heat transfer from the combustion chamber to the cylinder walls. The elliptical design ensures 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 performance. This piston has an oversize bore of +1.50mm.

Features

• High-strength forged construction for durability


• Optimized heat transfer for improved engine performance


• Elliptical design for even load distribution and prevention of piston collapse


• Precision manufacturing in Germany


• Oversize bore +1.50mm

Specifications

• Bore Size: 68.00mm


• Actual Diameter: 67.94mm


• Displacement: 249 cm³


• Stroke: 71.70mm


• Clearance: 0.06mm


• Compression Ratio: 2-Stroke


• OEM Compression Ratio: 2-Stroke


• Compression Height: 29.70mm

Included Components

• Piston: Wossner 8025D150


• Ring Set: RSB6800


• C-Clip Set: CW18


• Pin: WP033

Vehicle Fitments

• KTM GS 240 (1985-1988)


• KTM GS 250 (1985-1988)