Piston 98-00 YZF/WR400F 92 Hc, Wossner Piston Kit 8639DC

Piston 98-00 YZF/WR400F 92 Hc, Wossner Piston Kit 8639DC. Find the product specifications and compatibility information below.

Product details

• Product: Piston 98-00 YZF/WR400F 92 Hc, Wossner Piston Kit 8639DC
• Part number: 56-W199+00C.WO
• Brand: Wossner
• 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.
• High-compression forged piston for enhanced performance
• Optimized heat transfer for efficient combustion
• Elliptical design to prevent piston collapse
• Manufactured in Germany
• Bore Size: 92.02mm
• Actual Bore Diameter: 91.97mm
• 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 fitment

Applications listed in the supplier fitment data:

• YAMAHA YZF 400cc — 1998–1999
• YAMAHA WRF 400cc — 1998–2000
• YAMAHA YZF 400cc — 1998–2000

Match your exact make, model, year and specification before ordering.

Why buy from FDY Performance?

FDY Performance is a UK motorcycle and ATV parts specialist. We help riders find parts with clear specifications, vehicle fitment information where available and support before ordering.

Need help choosing the right part?

Contact us with your bike make, model and year, plus the part number shown above, and we can help you check compatibility.

• Call: 07765 534854
• Email: fdy@fdyperformance.com
• Website: www.fdyperformance.com