| Size | 77mm |
|---|---|
| Product Type | Pistons & Kits |
| Product Group | Engine |
| Catalogue | DIRT |
| Piston Diameter | 77.00 |
| Bore Diameter | |
| Piston Grade | |
| Compression Ratio |
PISTON KIT 01-04 YZF250 77.00, FORGED WOSSNER 8559DC 3-RING
Wossner forged piston kit designed for Yamaha YZ250F and WR250F models, featuring a 77.02mm bore and 76.98mm size with a three-ring design. Manufactured in Germany, this piston is engineered to enhance heat transfer, ensuring uniform expansion and even thrust load distribution. The elliptical design prevents localized pressure and piston collapse, making it ideal for high-performance applications.
Features
- High-strength forged piston for durability
- Optimized heat transfer for improved combustion efficiency
- Elliptical design to ensure uniform expansion and reduced localized pressure
- Three-ring design for enhanced sealing and performance
- Manufactured in Germany
Specifications
- Bore: 77.02mm
- Size: 76.98mm
- Part Number: 8559DC
- Compression Ratio: OEM
- OEM Compression Ratio: 12.50:1
- Lock Part Number: CW16
- Pin Part Number: WP059
- Ring Set Part Number: 770XAS-2
- Displacement: 249 cm³
- Stroke: 53.6mm
- Clearance: 0.04mm
- Dome Volume: -4.70 cm³
- Compression Height: 22.20mm
- Theoretical Weight: Not specified
Vehicle Fitments
- Yamaha YZ250F (2001-2004)
- Yamaha WR250F (2001-2004)
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