2Bros Parts

PISTON KIT 99-08 TRX XR 85.00, FORGED WOSSNER 702DC 400

$207.54
1

Wossner forged piston kit with an 85.02mm bore. 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. Specifications include a bore of 85.02mm (84.96mm actual), displacement of 397 cm³, stroke of 70.00mm, clearance of 0.06mm, Wossner compression ratio of 12.50:1, OEM compression ratio of 10.00:1, dome volume of +8.40 cm³, and compression height of 26.20mm.

Specifications
SKU
56-W4628.C.WO
Brand
Wossner
Availability
In Stock (1)

Fitments (40)

MakeModelYear
HONDATRX EX 4001999
HONDATRX EX 4002000
HONDATRX EX 4002001
HONDATRX EX 4002002
HONDATRX EX 4002003
HONDATRX EX 4002004
HONDATRX EX 4002005
HONDATRX EX 4002006
HONDATRX EX 4002007
HONDATRX EX 4002008
HONDATRX EX 4002009
HONDATRX EX 4002010
HONDATRX EX 4002011
HONDATRX EX 4002012
HONDATRX EX 4002013
HONDATRX EX 4002014
HONDATRX X 4002009
HONDATRX X 4002010
HONDATRX X 4002011
HONDATRX X 4002012
HONDATRX X 4002013
HONDATRX X 4002014
HONDAXR 4001996
HONDAXR 4001997
HONDAXR 4001998
HONDAXR 4001999
HONDAXR 4002000
HONDAXR 4002001
HONDAXR 4002002
HONDAXR 4002003
HONDAXR 4002004
HONDAXR 400R1996
HONDAXR 400R1997
HONDAXR 400R1998
HONDAXR 400R1999
HONDAXR 400R2000
HONDAXR 400R2001
HONDAXR 400R2002
HONDAXR 400R2003
HONDAXR 400R2004
General Product Group
Engine
General Product Type
Pistons & Kits
General Size
85mm
Variant Id
255782
Shipping OptionsShown at checkout
14-Day ReturnsHassle-free
Easy CheckoutCard friendly
Product details

FULL DESCRIPTION

Wossner Forged Piston Kit - 85.02mm Bore

Upgrade your ATV's performance with this high-quality Wossner forged piston kit. Engineered for superior strength, heat transfer, and durability, this piston is manufactured in Germany to exacting standards. The advanced elliptical design ensures uniform bearing surface distribution, effectively reducing localized pressure and preventing piston collapse under extreme conditions. This results in enhanced engine performance and longevity.

Key Features

  • Forged Construction: Provides exceptional strength and durability for demanding use.
  • Optimized Heat Transfer: Efficiently transfers heat to cylinder walls, aiding in thermal management.
  • Elliptical Design: Ensures uniform bearing surface distribution, even under heat expansion, preventing premature wear.
  • Increased Compression Ratio: Boosts engine performance with a 12.50:1 compression ratio compared to the OEM 10.00:1.
  • Premium Quality: Manufactured in Germany for guaranteed performance and reliability.

Specifications

  • Bore Size: 85.02mm (84.96mm actual)
  • Displacement: 397 cm³
  • Stroke: 70.00mm
  • Piston Clearance: 0.06mm
  • Wossner Compression Ratio: 12.50:1
  • OEM Compression Ratio: 10.00:1
  • Dome Volume: +8.40 cm³
  • Compression Height: 26.20mm
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