Skip to product information
PISTON KIT YZF WRF 250 2-RING, WOSSNER 8713DA 08-13 77mm, 5XC-11631-00-00
£175.93 GBP
Taxes included.
Wossner forged piston kit with a 77.00mm bore and 76.96mm 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: 77.00mm
- Diameter: 76.96mm
- 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# 8713DA)
- Lock P/N: CW16
- Pin P/N: WP059
- Ring Set P/N: 770XAS-2
- Rod P/N: P4005
- OEM Reference: 5XC-11631-00-00
Vehicle Fitments
- Yamaha YZ250F (2008-2013)
- Yamaha WR250F (2008-2013)