WOSSNER 95mm PISTON KIT B YAMAHA YZ450F 03-09, WR450F 03-15, GAS GAS EC450 13-15

Wossner forged piston kit designed for GasGas ECF450F (2013-2015), Yamaha YZ450F (2006-2009), and WR450F (2006-2009) models. Engineered for superior strength and optimal heat transfer, these pistons feature an elliptical design to ensure uniform bearing surface under heat expansion, reducing localized pressure and preventing piston collapse. Manufactured in Germany.

Features

• Forged piston for increased strength and durability
• Optimized heat transfer for efficient combustion chamber performance
• Elliptical design for even thrust load distribution and reduced piston collapse
• Manufactured in Germany

Specifications

• Bore Size: 95.01mm
• Actual Bore Diameter: 94.97mm
• Displacement: 449 cm³
• Stroke: 63.40mm
• Clearance: 0.04mm
• Wossner Compression Ratio: OEM
• OEM Compression Ratio: 12.30:1
• Dome Volume: -9.70 cm³
• Compression Height: 23.50mm
• Lock Part Number: CW18
• Pin Part Number: WP053
• Ring Set Part Number: 950ADS-2
• Rod Part Number: P4008

Vehicle Fitments

• GasGas ECF450F (2013-2015)
• Yamaha YZ450F (2006-2009)
• Yamaha WR450F (2006-2009)