2Bros Parts

PISTON KIT 06-09 CRF250R X 78, FORGED WOSSNER 8656DA, 13101-KRN-850

$201.43

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Delivery to United States 5–8 business days

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Wossner 78.00mm forged piston kit designed for enhanced engine performance. Features a high-compression design and forged construction for strength and longevity. Optimized heat transfer ensures efficient cooling, while the elliptical design prevents piston collapse and distributes thrust loads evenly. Manufactured in Germany. Bore Size: 78.00mm. Actual Bore Diameter: 77.96mm. Displacement: 249 cm³. Stroke: 52.20mm. Clearance: 0.04mm. Wossner Compression Ratio: 13.50:1. OEM Compression Ratio: 12.90:1. Dome Volume: -0.90 cm³. Compression Height: 24.00mm. Theoretical Weight: 19.00g. Gasket Part Number: D4004. Lock Part Number: CW16. Pin Part Number: WP059. Ring Set Part Number: 780XAS. Cross-Reference OEM Part Numbers: 13101-KRN-850. Part No: 56-W4830+00A.WO. Wossner Part No: 8656DA.

Specifications
SKU
56-W4830+00A.WO
Brand
Wossner
Availability
In Stock (3)
General Product Group
Engine
General Product Type
Pistons & Kits
General Size
78mm
Variant Id
256212
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Wossner 78.00mm Forged High-Compression Piston Kit

Enhance your engine's performance with the Wossner 78.00mm high-compression forged piston kit. Engineered in Germany, this piston is designed for optimal heat transfer, ensuring efficient cooling of the combustion chamber. Its advanced elliptical design creates a uniform bearing surface, which reduces localized pressure and distributes thrust loads evenly. This prevents piston collapse and contributes to greater engine longevity.

Key Features:

  • High-compression design for increased engine power
  • Forged construction for superior strength and durability
  • Optimized heat transfer for effective combustion chamber cooling
  • Elliptical piston shape for even load distribution and prevention of collapse
  • Precision manufactured in Germany

Specifications:

  • Bore Size: 78.00mm
  • Actual Bore Diameter: 77.96mm
  • Displacement: 249 cm³
  • Stroke: 52.20mm
  • Clearance: 0.04mm
  • Wossner Compression Ratio: 13.50:1
  • OEM Compression Ratio: 12.90:1
  • Dome Volume: -0.90 cm³
  • Compression Height: 24.00mm
  • Theoretical Weight: 19.00g

Included Components:

  • Gasket Part Number: D4004
  • Lock Part Number: CW16
  • Pin Part Number: WP059
  • Ring Set Part Number: 780XAS

Cross-Reference OEM Part Numbers:

  • 13101-KRN-850
  • Wossner Part Number: 8656DA
Before you buy

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Yes. We ship from the UK. Orders ship within 3 working days, then delivery to the United States takes 5–8 business days. The delivery price is shown at checkout before you pay. Delivery details

Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy

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