WOSSNER 80mm PISTON KIT YAMAHA WR250F 2008-2014, YZ250F 2008-2013, 2-RING

Wossner forged piston kit with an 80.00mm bore and 79.95mm diameter, designed for Yamaha YZ250F and WR250F models. This 2-ring piston is engineered for high performance, featuring superior strength and design. Manufactured in Germany, it ensures 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
• 2-ring piston design for performance applications
• Increased compression ratio for improved power output
• Manufactured in Germany

Specifications

• Bore: 80.00mm
• Diameter: 79.95mm
• Display (cm³): 249
• Stroke (mm): 53.60
• Clearance (mm): 0.04
• Wossner Compression Ratio: 14.10:1
• OEM Compression Ratio: 13.50:1
• Dome Volume (cm³): -5.00
• Compression Height (mm): 22.50

Cross-Reference OEM Part Numbers

• Wossner Piston Yamaha YZ250F (PN# 8713D300)
• Lock P/N: CW16
• Pin P/N: WP059
• Ring Set P/N: 800XAS
• Rod P/N: P4005

Vehicle Fitments

• Yamaha YZ250F (2008-2013)
• Yamaha WR250F (2008-2013)

Majority of our listings are for a direct replacement for your original part.

Our parts are made of quality and are designed to meet or exceed the original OEM Standards.

Our products are often a cost effective alternative to genuine OEM Parts.

Please note: the models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models.