Wossner high-compression forged piston kit designed for enhanced performance and durability. Engineered with an elliptical shape to ensure uniform bearing surfaces under heat expansion, reducing localized pressure and preventing piston collapse. Optimized for efficient heat transfer and manufactured in Germany for high-performance applications.

Features

• High-compression forged construction for increased power and durability


• Optimized heat transfer for improved combustion efficiency


• Elliptical design for even thrust load distribution


• Made in Germany

Specifications

• Bore Size: 94.97mm (+0.01mm oversize = 95.01mm)


• Displacement: 449 cm³


• Stroke: 63.40mm


• Clearance: 0.04mm


• Compression Ratio: OEM (12.50:1)


• Dome Volume: -7.80 cm³


• Compression Height: 23.50mm


• Theoretical Weight: Not specified

Included Components

• Piston Kit (8570DB)


• Piston Clip: CW18


• Piston Pin: WP053


• Piston Ring: 950ADS-2

Vehicle Fitments

• Yamaha YZ450F (2003-2004)


• Yamaha WR450F (2003-2004)