Piston Kit 87-07 YFS200 66.25, Wossner 8101D025 Yamaha ATV

Description

The Wossner 8101D025 piston kit is designed for Yamaha YFS200 Blaster models from 1988 to 2006, featuring a 66.25 mm bore for +0.25 mm oversize applications. Manufactured in Germany using forged construction, this piston delivers superior durability and efficient thermal conductivity. The elliptical design ensures even thrust load distribution during piston expansion, reducing localised pressure and minimising the risk of piston collapse. The kit includes all necessary components for a dependable engine rebuild.

Features

  • Forged piston construction for high strength and heat resistance

  • Optimised combustion chamber heat transfer to cylinder wall

  • Elliptical profile provides uniform bearing surface under thermal expansion

  • Minimises localised stress and helps prevent piston collapse

  • Precision-manufactured in Germany

Specifications

  • Bore Size: 66.25 mm

  • Actual Bore Diameter: 66.19 mm

  • Stroke: 57.00 mm

  • Display Displacement: 199 cm³

  • Clearance: 0.06 mm

  • Compression Ratio (Wossner and OEM): 2-stroke

  • Compression Height: 29.90 mm

Cross-Reference Wossner Part Numbers

  • Piston Kit: 8101D025

  • Lock: CW16

  • Pin: WP027

  • Ring Set: RSB6625 (Quantity: 2)

  • Rod: P2030

  • Part No.: 56-W573+025.WO

Vehicle Fitments

  • Yamaha YFS200 Blaster (1988–2006)

Piston Kit 87-07 YFS200 66.25, Wossner 8101D025 Yamaha ATV

Product form

The Wossner 8101D025 piston kit is designed for Yamaha YFS200 Blaster models from 1988 to 2006, featuring a 66.25 mm... Read more

Out of stock

£0.00 Incl. VAT

    • Guaranteed secure & safe checkout.

      shop pay

    SKU: 56-W573+025.WO

    • Free shipping on all orders above £75
    • No hassle returns within 30 days

    Description

    The Wossner 8101D025 piston kit is designed for Yamaha YFS200 Blaster models from 1988 to 2006, featuring a 66.25 mm bore for +0.25 mm oversize applications. Manufactured in Germany using forged construction, this piston delivers superior durability and efficient thermal conductivity. The elliptical design ensures even thrust load distribution during piston expansion, reducing localised pressure and minimising the risk of piston collapse. The kit includes all necessary components for a dependable engine rebuild.

    Features

    • Forged piston construction for high strength and heat resistance

    • Optimised combustion chamber heat transfer to cylinder wall

    • Elliptical profile provides uniform bearing surface under thermal expansion

    • Minimises localised stress and helps prevent piston collapse

    • Precision-manufactured in Germany

    Specifications

    • Bore Size: 66.25 mm

    • Actual Bore Diameter: 66.19 mm

    • Stroke: 57.00 mm

    • Display Displacement: 199 cm³

    • Clearance: 0.06 mm

    • Compression Ratio (Wossner and OEM): 2-stroke

    • Compression Height: 29.90 mm

    Cross-Reference Wossner Part Numbers

    • Piston Kit: 8101D025

    • Lock: CW16

    • Pin: WP027

    • Ring Set: RSB6625 (Quantity: 2)

    • Rod: P2030

    • Part No.: 56-W573+025.WO

    Vehicle Fitments

    • Yamaha YFS200 Blaster (1988–2006)

    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.

    WHY NOT CHECK OUT

    Recently viewed products

      Sign up for our newsletter

      Subscribe to our Mailing List

      Never miss any news and be the first to know about sale and offers

      © 2026 Radhouse, Powered by Shopify

        • American Express
        • Apple Pay
        • Diners Club
        • Discover
        • Google Pay
        • Maestro
        • Mastercard
        • PayPal
        • Shop Pay
        • Union Pay
        • Visa