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Wossner Piston Kit - Honda XR400R (96-04) TRX400EX (99-08) - 397cc / 84.94mm / 11.0:1

Availability: In stock


Quick Overview

Wossner Pistons


Wossner Pistons feature precision German engineering. An OEM manufacturer for renowned motorycle parts manufacturers, Wossner Piston Kits boast unmatched fit and finish for high performance dirt bikes, ATVs and UTVs.

  • FITS: Honda XR400 (1996-2004) TRX400EX (1999-2008)
  • FEATURES: 397cc Discplacement / 84.94mm Piston Size / 11:1 Compression Ratio

Wossner Pistons USA

  • Bore Size: 85mm
  • Piston Size: 84.94mm
  • Clearance: 0.06mm
  • Compression Height: 26.20mm
  • Compression Ratio: 11:1
  • Compression Ratio (OEM): -
  • Engine Cylinders: 1
  • Engine Discplacement: 397cc
  • Dome Volume: -
  • Engine Type: 4 stroke
  • Engine Code: -
  • Piston Weight: -
  • Stroke: -
  • Valves Per Cylinder: 4
  • Gasket Part Number: -
  • Clip / Lock Part Number: CW20
  • Pin Part Number: WP052
  • Ring Set Part Number: 850XSY
  • Connecting Rod Part Number: P4021
  • Needle Bearing Part Number: 0
  • Rohling Part Number: W4200

Wossner Pistons USA

Wossner Pistons is Germany's most prestigious forged piston and rod manufacturer. Featuring a 25-year lineage in legendary performance in the world of racing, the Wossner Group of companies includes Forging Group Monale, the Italian forging facility that supplies many notable global powerhouse automotive and powersports manufacturers. Producing performance engineered 2-stroke and 4-stroke pistons, Wossner Pistons designs performance applications for snowmobiles, motorcycles, dirt bikes, ATVs, UTVs, cars, trucks, boats and watercraft.

Wossner Pistons enthusiasm for innovation is based upon the belief that it is only possible to discover something new when you constantly question that which you already know. This is one of the reasons why we are actively involved in researching the properties of low friction surfaces and in developing new such materials. We are in close contact with the research departments at various colleges and universities and are currently carrying out a series of tests, together with a Swiss institution, into friction reduction. In close cooperation with the R&D departments at leading motor manufacturers we develop high performance prototype pistons.

In order to guarantee the highest quality Wossner Pistons production machines have been specially customized to meet our requirements and are constantly being further developed - the close cooperation between our engineers and the manufacturers is highly beneficial to both parties. In order to guarantee the precision and consistency of the end products, our CNC machines are housed in an air conditioned environment. Wossner Pistons expertise enables us produce one-off pistons to individual specifications.

Additional Information

Manufacturer Wossner
Part Number WO-8604DA