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PISTON 98-00 YZF/WR400F 92 HC, WOSSNER PISTON KIT 8639DA
£175.93 GBP
Taxes included.
Wossner forged piston kit designed for high compression and performance. Engineered for optimal heat transfer to cylinder walls, ensuring efficient combustion. The elliptical design provides a uniform bearing surface under heat expansion, reducing localized pressure and evenly distributing thrust loads to prevent piston collapse. Manufactured in Germany to high-quality standards.
Features
- High-compression forged piston for enhanced performance
- Optimized heat transfer for efficient combustion
- Elliptical design to prevent piston collapse
- Manufactured in Germany
Specifications
- Bore Size: 92.00mm
- Actual Bore Diameter: 91.95mm
- Displacement: 399 cm³
- Stroke: 60.10mm
- Clearance: 0.05mm
- Wossner Compression Ratio: 13.50:1
- OEM Compression Ratio: 12.50:1
- Dome Volume: -4.60 cm³
- Compression Height: 24.10mm
- Theoretical Weight: Not specified
Included Components
- Lock Part Number: CW18
- Pin Part Number: WP053
- Ring Set Part Number: 920XSY
Vehicle Fitments
- Yamaha WR400F (1998-1999)
- Yamaha YZ400F (1998-1999)