Wossner Premium Series Piston Kit - 8957DA Yamaha YZ 250 / WR 250 2019-2025
Wossner Premium Series Piston Kit - 8957DA Yamaha YZ 250 / WR 250 2019-2025
Product Details
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
| Bore Size | 77.00 mm |
| Stroke Length | 53.60 mm |
| Engine Type | 4-Stroke |
| Piston Material | Aluminum Alloy |
| Piston Size | 76.96 mm |
| Model | Premium Series |
| Riding Style | Off-Road |
| Compression Ratio | 14.0:1 |
| Style | Standard Size A |
| Units | Kit |
| Bore - Oversize | Standard |
| Piston Material | Forged |
| Bore - Oversize | Standard |
| Product Name | Piston Kit |
Part Notes
- Double bridge forging.
- 3D crown.
- Two ring design.
- Kit Includes:
- • Piston #8957DA
- • Ring Set #RIK77.00D
- • Wrist Pin #WP070-SP
- • Retaining Clips #CW16
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
| Bore Size | 77.00 mm |
| Stroke Length | 53.60 mm |
| Engine Type | 4-Stroke |
| Piston Material | Aluminum Alloy |
| Piston Size | 76.96 mm |
| Model | Premium Series |
| Riding Style | Off-Road |
| Compression Ratio | 14.0:1 |
| Style | Standard Size A |
| Units | Kit |
| Bore - Oversize | Standard |
| Piston Material | Forged |
| Bore - Oversize | Standard |
| Product Name | Piston Kit |
Part Notes
- Double bridge forging.
- 3D crown.
- Two ring design.
- Kit Includes:
- • Piston #8957DA
- • Ring Set #RIK77.00D
- • Wrist Pin #WP070-SP
- • Retaining Clips #CW16
| Store SKU | MFR. Product # | Availability |
|---|---|---|
| 0910-6138 | 8957DA | In Stock |
This Product Fits
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.
Product Description
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
| Bore Size | 77.00 mm |
| Stroke Length | 53.60 mm |
| Engine Type | 4-Stroke |
| Piston Material | Aluminum Alloy |
| Piston Size | 76.96 mm |
| Model | Premium Series |
| Riding Style | Off-Road |
| Compression Ratio | 14.0:1 |
| Style | Standard Size A |
| Units | Kit |
| Bore - Oversize | Standard |
| Piston Material | Forged |
| Bore - Oversize | Standard |
| Product Name | Piston Kit |
Part Notes
- Double bridge forging.
- 3D crown.
- Two ring design.
- Kit Includes:
- • Piston #8957DA
- • Ring Set #RIK77.00D
- • Wrist Pin #WP070-SP
- • Retaining Clips #CW16
Part Numbers
| Store SKU | MFR. Product # | Availability |
|---|---|---|
| 0910-6138 | 8957DA | In Stock |
Fitment
This Product Fits
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.