PISTON KIT 99-08 TRX XR 86.00, FORGED WOSSNER 8702D100 400
Wossner forged piston kit with an 86mm bore. 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 include forged construction for superior strength and durability, optimized heat transfer to cylinder walls, an elliptical design for uniform bearing surface under heat expansion, and increased compression ratio for improved engine performance. Made in Germany. Specifications include a bore of 86mm (85.94mm 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. Cross-reference OEM part numbers include Wossner Piston: 8702D100, Lock: CW20, Pin: WP052, Ring Set: 860XSY, Rod: P4021.
- SKU
- 56-W4628_100.WO
- Brand
- Wossner
- Availability
- In Stock (1)
FULL DESCRIPTION
Wossner Forged Piston Kit 86.00mm
Upgrade your ATV's performance with this Wossner forged piston kit. Engineered in Germany, this high-performance piston offers superior strength, improved heat transfer, and enhanced durability for demanding off-road use.
The advanced elliptical design ensures uniform bearing surface distribution even under significant heat expansion. This design minimizes localized pressure, preventing piston collapse and promoting consistent engine operation.
Key Features:
- Forged construction for exceptional strength and longevity
- Optimized heat transfer for efficient cooling
- Elliptical piston design for even bearing load
- Increased compression ratio for greater power output
- Precision manufacturing in Germany
Specifications:
- Bore Size: 86.00mm (85.94mm actual)
- Engine Displacement: 397 cm³
- Stroke Measurement: 70.00mm
- Piston Clearance: 0.06mm
- Wossner Compression Ratio: 12.50:1
- Original Equipment Manufacturer (OEM) Compression Ratio: 10.00:1
- Dome Volume: +8.40 cm³
- Compression Height: 26.20mm
Wossner Part Components:
- Wossner Piston: 8702D100
- Lock Ring: CW20
- Piston Pin: WP052
- Ring Set: 860XSY
- Connecting Rod: P4021
