Piston Kit XR400 TRX400 89.00, Forged Wossner 8604D400

Description

Wössner forged piston kit with an 89mm bore, designed for Honda XR400R motorcycles and TRX400 series ATVs. Manufactured in Germany, this high-performance piston enhances strength, heat transfer, and durability. The elliptical design ensures uniform bearing surface distribution, reducing localized pressure and preventing piston collapse.

Features

  • Forged construction for superior strength and durability
  • Optimized heat transfer to cylinder walls
  • Elliptical design for uniform bearing surface under heat expansion
  • Increased compression ratio for improved engine performance
  • Made in Germany

Specifications

  • Bore: 89mm (88.94mm actual)
  • Display: 397 cm³
  • Stroke: 70.00mm
  • Clearance: 0.06mm
  • Wössner Compression Ratio: 11.00:1
  • OEM Compression Ratio: 10.00:1
  • Dome Volume: +3.20 cm³
  • Compression Height: 26.20mm

Cross-Reference OEM Part Numbers

  • Wössner Piston: 8604D400
  • Lock: CW20
  • Pin: WP052
  • Ring Set: 890XSY
  • Rod: P4021

Vehicle Fitments

  • Honda XR400R (1996-2004)
  • Honda TRX400EX (1999-2008)
  • Honda TRX400X (2009-2012)

Vehicle Compatibility

Please check the exact model and year before ordering.

Manufacturer Model Years
HONDA XR 400 1996-2004
HONDA XR R 400 1996-2004
HONDA TRX EX 400 1999-2008

Piston Kit XR400 TRX400 89.00, Forged Wossner 8604D400

Product form

Wössner forged piston kit with an 89mm bore, designed for Honda XR400R motorcycles and TRX400 series ATVs. Manufactured in Germany,... Read more

1 in stock 1-2 business days

£202.09 Incl. VAT

    • Guaranteed secure & safe checkout.

      shop pay

    SKU: 56-W4606+400.WO

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

    Description

    Wössner forged piston kit with an 89mm bore, designed for Honda XR400R motorcycles and TRX400 series ATVs. Manufactured in Germany, this high-performance piston enhances strength, heat transfer, and durability. The elliptical design ensures uniform bearing surface distribution, reducing localized pressure and preventing piston collapse.

    Features

    • Forged construction for superior strength and durability
    • Optimized heat transfer to cylinder walls
    • Elliptical design for uniform bearing surface under heat expansion
    • Increased compression ratio for improved engine performance
    • Made in Germany

    Specifications

    • Bore: 89mm (88.94mm actual)
    • Display: 397 cm³
    • Stroke: 70.00mm
    • Clearance: 0.06mm
    • Wössner Compression Ratio: 11.00:1
    • OEM Compression Ratio: 10.00:1
    • Dome Volume: +3.20 cm³
    • Compression Height: 26.20mm

    Cross-Reference OEM Part Numbers

    • Wössner Piston: 8604D400
    • Lock: CW20
    • Pin: WP052
    • Ring Set: 890XSY
    • Rod: P4021

    Vehicle Fitments

    • Honda XR400R (1996-2004)
    • Honda TRX400EX (1999-2008)
    • Honda TRX400X (2009-2012)

    Vehicle Compatibility

    Please check the exact model and year before ordering.

    Manufacturer Model Years
    HONDA XR 400 1996-2004
    HONDA XR R 400 1996-2004
    HONDA TRX EX 400 1999-2008

    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

      © 2026 Radhouse, Powered by Shopify

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