PISTON KIT 06-11 YFZ450 95 HC FORGED WOSSNER 8657DA

Wossner forged piston kit with a 95.00mm bore and 94.95mm diameter, designed for Yamaha ATV/UTV 4-stroke models. Manufactured in Germany, this piston offers superior strength and design, ensuring optimal heat transfer to cylinder walls. Its elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse.

Features

• Forged construction for superior strength
• Optimized heat transfer for efficient combustion
• Elliptical design for uniform load distribution
• Manufactured in Germany

Specifications

• Bore: 95.00mm
• Diameter: 94.95mm
• Display (cm³): 449
• Stroke (mm): 63.40
• Clearance (mm): 0.05
• Wossner Compression Ratio: 13.50:1
• OEM Compression Ratio: 11.40:1
• Dome Volume (cm³): -1.60
• Compression Height (mm): 25.10

Cross-Reference OEM Part Numbers

• Wossner Piston Yamaha YFZ450 (PN# 8657DA)
• Lock P/N: CW20
• Pin P/N: WP038
• Ring Set P/N: 950ADS-2
• Rod P/N: P4030

Vehicle Fitments

• Yamaha YFZ450 (2006-2012)
• Yamaha YFZ450R (2006-Present)