Wossner forged piston kit designed for durability and high 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 to 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: 74.50mm


• Actual Bore Diameter: 74.45mm


• Displacement: 124 cm³


• Stroke: 59.60mm


• Clearance: 0.05mm


• Wossner Compression Ratio: OEM


• OEM Compression Ratio: 10.20:1


• Dome Volume: +1.40 cm³


• Compression Height: 23.60mm


• Theoretical Weight: Not specified

Included Components

• Lock Part Number: CW18


• Pin Part Number: WP031


• Ring Set Part Number: 745XDS

Vehicle Fitments

• Yamaha TTR 250 (1996-2009)