2Bros Parts

PISTON 98-00 YZF/WR400F 92 HC, WOSSNER PISTON KIT 8639DA

£177.20

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Wossner forged piston kit with 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 include high-compression forged piston for enhanced performance, optimized heat transfer for efficient combustion, elliptical design to prevent piston collapse, and German manufacturing. 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. Included components: Lock Part Number CW18, Pin Part Number WP053, Ring Set Part Number 920XSY.

Specifications
SKU
56-W199+00A.WO
Brand
Wossner
Availability
In Stock (2)
General Product Group
Engine
General Product Type
Pistons & Kits
General Size
92mm
Variant Id
254959
Delivery2–4 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Wossner High Compression Forged Piston Kit

Upgrade your motorcycle's performance with this high-compression forged piston kit from Wossner. Engineered for maximum power and efficiency, this piston is designed to optimize heat transfer to the cylinder walls for superior combustion. The innovative elliptical design ensures a uniform bearing surface even under extreme heat expansion, effectively reducing localized pressure and evenly distributing thrust loads to prevent piston collapse. Manufactured in Germany to exacting standards, this Wossner piston kit is built for durability and peak performance.

Key Features:

  • High-compression forged piston for enhanced engine performance
  • Optimized heat transfer for efficient and powerful combustion
  • Elliptical design engineered to prevent piston collapse under load
  • Premium quality manufacturing from 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

Included Components:

  • Lock Part Number: CW18
  • Pin Part Number: WP053
  • Ring Set Part Number: 920XSY
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UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details

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