PISTON KIT YZF WRF 250 2-RING, WOSSNER 8713D300 08-13 77mm
Wossner forged piston kit with an 80.00mm bore and 79.95mm diameter. 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 for superior strength, optimized heat transfer for efficient combustion, an elliptical design for uniform load distribution, a 2-ring piston design for performance applications, increased compression ratio for improved power output, and it is 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 include Wossner Piston Yamaha YZ250F (PN# 8713D300), Lock P/N: CW16, Pin P/N: WP059, Ring Set P/N: 800XAS, Rod P/N: P4005.
- SKU
- 56-W241+300.WO
- Brand
- Wossner
- Availability
- In Stock (1)
FULL DESCRIPTION
Wossner 2-Ring Forged Piston Kit for Yamaha YZF/WRF 250
Upgrade your Yamaha YZF or WRF 250 with this high-performance Wossner forged piston kit. Engineered in Germany, this 2-ring piston is designed for maximum strength and durability, delivering a significant boost in power output and combustion efficiency.
Key Features
- Forged Construction: Provides superior strength and resilience compared to cast pistons.
- Optimized Heat Transfer: Promotes efficient combustion and helps maintain optimal operating temperatures.
- Elliptical Design: Ensures a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse.
- 2-Ring Piston: Ideal for performance applications requiring enhanced sealing and power.
- Increased Compression Ratio: Features a Wossner compression ratio of 14.10:1 (OEM 13.50:1) for improved power output.
- Manufactured in Germany: Guarantees high quality and precision engineering.
Specifications
- Bore: 80.00mm
- Diameter: 79.95mm
- Displacement (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
- Lock P/N: CW16
- Pin P/N: WP059
- Ring Set P/N: 800XAS


