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PISTON KIT XR400 TRX400 85.50, FORGED WOSSNER 8604D050
  • PISTON KIT XR400 TRX400 85.50, FORGED WOSSNER 8604D050
  • PISTON KIT XR400 TRX400 85.50, FORGED WOSSNER 8604D050
  • PISTON KIT XR400 TRX400 85.50, FORGED WOSSNER 8604D050
  • PISTON KIT XR400 TRX400 85.50, FORGED WOSSNER 8604D050
  • PISTON KIT XR400 TRX400 85.50, FORGED WOSSNER 8604D050
  • PISTON KIT XR400 TRX400 85.50, FORGED WOSSNER 8604D050
  • PISTON KIT XR400 TRX400 85.50, FORGED WOSSNER 8604D050
  • PISTON KIT XR400 TRX400 85.50, FORGED WOSSNER 8604D050
PISTON KIT XR400 TRX400 85.50, FORGED WOSSNER 8604D050

PISTON KIT XR400 TRX400 85.50, FORGED WOSSNER 8604D050

£186.49 GBP
Taxes included.

Wössner forged piston kit with an 85.50mm 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: 85.50mm (85.44mm 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

Cross-Reference OEM Part Numbers

  • Wössner Piston: 8604D050
  • Lock: CW20
  • Pin: WP052
  • Ring Set: 855XSY
  • Rod: P4021

Vehicle Fitments

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