| Size | 94mm |
|---|---|
| Product Type | Pistons & Kits |
| Product Group | Engine |
| Catalogue | DIRT |
| Piston Diameter | 94.00 |
| Bore Diameter | |
| Piston Grade | |
| Compression Ratio |
PISTON KIT 98-99 YZF400 94.00, FORGED WOSSNER 8603D200
The Wossner 94mm Bore Piston Kit (Part No. 8603D200) is a high-performance forged piston designed for Yamaha YZ400F and WR400F models. Engineered for superior strength and durability, it enhances heat transfer within the combustion chamber and features an elliptical design to ensure even load distribution, reducing localized pressure and preventing piston collapse. Manufactured in Germany, this piston maintains the OEM compression ratio for reliable engine performance.
Features
- High-strength forged piston construction
- Optimized heat transfer for improved combustion efficiency
- Elliptical design for even thrust load distribution
- Manufactured in Germany
Specifications
- Bore Size: 94mm
- Actual Bore Diameter: 93.95mm
- Compression Ratio: OEM
- OEM Compression Ratio: 11.0:1
- Displacement: 290cc
- Stroke: 61.20mm
- Clearance: 0.06mm
- Dome Volume: -4.80cm³
- Compression Height: 23.00mm
Cross-Reference OEM Part Numbers
- Lock P/N: CW18
- Pin P/N: WP053
- Ring Set P/N: 940XSY
Vehicle Fitments
- Yamaha YZ400F (1998-1999)
- Yamaha WR400F (1998-1999)
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