Piston Kit Yfm YFB250 71.50, Wossner Forged 8659D050

Description

The Wossner 71.50mm Bore Piston Kit (Part No. 8659D050) is a high-performance forged piston designed for Yamaha YFM250 Timberwolf, YFB250 Bear Tracker, Bruin, and Big Bear models. Engineered for strength and durability, it optimizes heat transfer within the combustion chamber and features an elliptical design to ensure even load distribution, reducing localized pressure and preventing piston collapse. Manufactured in Germany, this piston maintains the OEM compression ratio for reliable engine performance.

Features

  • High-strength forged piston construction
  • Optimized heat transfer for improved combustion efficiency
  • Elliptical design for even thrust load distribution
  • Manufactured in Germany

Specifications

  • Bore Size: 71.50mm
  • Actual Bore Diameter: 71.44mm
  • Compression Ratio: OEM
  • OEM Compression Ratio: 9.50:1
  • Displacement: 229cc
  • Stroke: 58.00mm
  • Clearance: 0.06mm
  • Dome Volume: -4.70cm³
  • Compression Height: 23.80mm
  • Theoretical Weight: Not specified

Cross-Reference OEM Part Numbers

  • Lock P/N: CW16
  • Pin P/N: WP041
  • Ring Set P/N: 715XDS

Vehicle Fitments

  • Yamaha YFM250 Timberwolf (1990-2000)
  • Yamaha YFB250 Bear Tracker (2000-2004)
  • Yamaha Bruin (2005-2006)
  • Yamaha Big Bear (2007-2009)

Piston Kit Yfm YFB250 71.50, Wossner Forged 8659D050

Product form

The Wossner 71.50mm Bore Piston Kit (Part No. 8659D050) is a high-performance forged piston designed for Yamaha YFM250 Timberwolf, YFB250... Read more

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    SKU: 56-W4675+050.WO

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    Description

    The Wossner 71.50mm Bore Piston Kit (Part No. 8659D050) is a high-performance forged piston designed for Yamaha YFM250 Timberwolf, YFB250 Bear Tracker, Bruin, and Big Bear models. Engineered for strength and durability, it optimizes heat transfer within the combustion chamber and features an elliptical design to ensure even load distribution, reducing localized pressure and preventing piston collapse. Manufactured in Germany, this piston maintains the OEM compression ratio for reliable engine performance.

    Features

    • High-strength forged piston construction
    • Optimized heat transfer for improved combustion efficiency
    • Elliptical design for even thrust load distribution
    • Manufactured in Germany

    Specifications

    • Bore Size: 71.50mm
    • Actual Bore Diameter: 71.44mm
    • Compression Ratio: OEM
    • OEM Compression Ratio: 9.50:1
    • Displacement: 229cc
    • Stroke: 58.00mm
    • Clearance: 0.06mm
    • Dome Volume: -4.70cm³
    • Compression Height: 23.80mm
    • Theoretical Weight: Not specified

    Cross-Reference OEM Part Numbers

    • Lock P/N: CW16
    • Pin P/N: WP041
    • Ring Set P/N: 715XDS

    Vehicle Fitments

    • Yamaha YFM250 Timberwolf (1990-2000)
    • Yamaha YFB250 Bear Tracker (2000-2004)
    • Yamaha Bruin (2005-2006)
    • Yamaha Big Bear (2007-2009)

    Shipping & Delivery

    How long will my item take to arrive?

    Orders are typically dispatched within 1 working day and are shipped on a 24hour (non-guaranteed) service.

    Where do you ship to?

    We currently only ship orders within the UK.

    How can I track my order?

    Once your order has been dispatched, you will receive a tracking code. Tracking information is emailed to the email address that was provided when placing the order.

    Can I collect my order?

    Unfortunately we do not offer order collections from our fulfilment centre.

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