PISTON KIT YZF WRF 250 2-RING, WOSSNER 8713DA 08-13 77mm, 5XC-11631-00-00
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 include forged construction, optimized heat transfer, elliptical design for uniform load distribution, 2-ring piston design, increased compression ratio, and German manufacturing. Specifications: Bore 77.00mm, Diameter 76.96mm, Display 249 cm³, Stroke 53.60mm, Clearance 0.04mm, Wossner Compression Ratio 14.10:1, OEM Compression Ratio 13.50:1, Dome Volume -5.00 cm³, Compression Height 22.50mm. 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.
- SKU
- 56-W241+00A.WO
- Brand
- Wossner
- Availability
- In Stock (4)
FULL DESCRIPTION
Wossner 2-Ring Forged Piston Kit for Yamaha YZ250F and WR250F
Enhance your motorcycle's performance with this Wossner forged piston kit. Engineered for precision and durability, this kit features a 77.00mm bore and a 76.96mm diameter, designed to optimize power output for high-performance applications. Manufactured in Germany, Wossner pistons are known for their superior strength and advanced design.
The 2-ring piston design contributes to improved efficiency and power delivery. Its innovative elliptical shape ensures a uniform bearing surface, even under extreme heat, which reduces localized pressure and evenly distributes thrust loads. This prevents piston collapse and promotes longevity. The piston also facilitates optimal heat transfer to the cylinder walls, contributing to efficient combustion and improved engine performance.
Key Features:
- Forged construction for exceptional strength and reliability.
- Optimized heat transfer for enhanced combustion efficiency.
- Elliptical piston design for uniform load distribution and reduced wear.
- 2-ring configuration tailored for performance needs.
- Increased compression ratio for a noticeable boost in power.
- Precision manufactured in Germany.
Specifications:
- Bore: 77.00mm
- Diameter: 76.96mm
- Displacement: 249 cm³
- Stroke: 53.60mm
- Clearance: 0.04mm
- Wossner Compression Ratio: 14.10:1
- OEM Compression Ratio: 13.50:1
- Dome Volume: -5.00 cm³
- Compression Height: 22.50mm
Included Components:
- Piston
- Lock Ring (Part # CW16)
- Pin (Part # WP059)
- Ring Set (Part # 770XAS-2)
Cross-Reference OEM Part Numbers:
- Wossner Piston Yamaha YZ250F (PN# 8713DA)
- OEM Reference: 5XC-11631-00-00
