PISTON KIT 99-08 TRX XR 85.00, FORGED WOSSNER 702DC 400
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.
- SKU
- 56-W4628.C.WO
- Brand
- Wossner
- Availability
- In Stock (1)
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


