2Bros Parts

PISTON KIT 81-19 PW50 40.50, WOSSNER 8267D050 YAMAHA

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Wossner forged piston kit 8267D050 is a +0.50mm oversize replacement for Yamaha PW50 models. Engineered with precision and manufactured in Germany, it provides enhanced strength and consistent performance for two-stroke engine applications requiring a slightly larger bore size. Features forged piston construction for superior strength and durability, elliptical design for a consistent bearing surface during heat expansion, and promotes efficient heat dissipation to cylinder walls. Prevents localised stress and piston collapse. Manufactured in Germany. Specifications: Bore Size: 40.50mm, Actual Piston Size: 40.45mm, Stroke: 39.20mm, Piston Clearance: 0.05mm, Wossner Compression Ratio: 2-stroke, OEM Compression Ratio: 2-stroke, Compression Height: 24.90mm, Lock Part Number: CW10, Pin Part Number: WP105, Ring Set Part Number: RSB4050. Cross-Reference OEM Part Numbers: Part No: 8267D050.

Specifications
SKU
56-W938+050_WO
Brand
Wossner
Availability
In Stock (1)
General Product Group
Engine
General Product Type
Pistons & Kits
General Size
40.50mm
Variant Id
258285
Delivery5–8 business days
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Wossner Forged Piston Kit 40.50mm Oversize

This Wossner forged piston kit offers a +0.50mm oversize replacement, specifically engineered for enhanced performance and durability in select Yamaha PW50 models. Manufactured in Germany to exacting standards, this piston is designed to provide superior strength and consistent operation, especially for two-stroke engines that require a slightly larger bore size for optimal power output.

Key Features:

  • Forged Piston Construction: Provides exceptional strength and longevity, ensuring reliable performance under demanding conditions.
  • Elliptical Design: Engineered to maintain a consistent bearing surface even with heat expansion, promoting smoother operation and reducing wear.
  • Efficient Heat Dissipation: Designed to effectively transfer heat away from the piston to the cylinder walls, preventing overheating and maintaining optimal operating temperatures.
  • Prevents Stress and Collapse: The advanced design helps to avoid localized stress points and prevents piston collapse, contributing to engine longevity.
  • Precision Manufacturing: Proudly made in Germany, guaranteeing high quality and meticulous craftsmanship.

Specifications:

  • Bore Size: 40.50mm
  • Actual Piston Size: 40.45mm
  • Stroke: 39.20mm
  • Piston Clearance: 0.05mm
  • Wossner Compression Ratio: 2-stroke
  • OEM Compression Ratio: 2-stroke
  • Compression Height: 24.90mm
  • Lock Part Number: CW10
  • Pin Part Number: WP105
  • Ring Set Part Number: RSB4050
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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

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