Features
- Enhanced piston pin oiling slots, radial boss machining, and annular grooves for improved wrist pin lubrication
- Lightweight piston with a tight piston wall clearance for a quieter running engine
- Skirt coated for reduced friction and improved break in performance
- Ring land treatment for improved ring seal and oil control
- Double bridged forging design where noted
- Kit includes piston, rings, wrist pin and pin locks
Specs
| Model | Premium Series |
| Compression Ratio | 12.5:1 |
| Engine Type | 4-Stroke |
| Piston Material | Aluminum Alloy |
| Riding Style | Off-Road |
| Bore - Oversize | Standard |
| Product Name | Piston Kit |
| Bore Size | 77.00 mm |
| Bore - Oversize | Standard |
| Piston Material | Forged |
| Stroke Length | 53.60 mm |
| Style | Standard Size A |
| Units | Kit |
| Piston Size | 76.96 mm |
Part Notes
- Double bridge forging.
- Kit Includes:
- • Piston #8559DA
- • Ring Set #RIK77.00D3
- • Wrist Pin #WP070-SP
- • Retaining Clips #CW16
| 2001-2004 | Yamaha | YZ 250 F |
| 2001-2013 | Yamaha | WR 250 F |
Fitment Disclosure
This quick reference fitment information is provided to direct you to our catalog information
and the manufacturer's information. Consult manufacturer publication(s) and/or website(s) for specific
fitment and application information and other important information. This fitment information is based
upon the stock version of the motorcycle or unit referenced and any accessory added or other modification
could invalidate the quick reference information provided.
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