SPI .010 Over Bore Piston Kit for Ski-Doo MXZ 670 HO & Summit X 670 HO 78.25mm
SPI .010 Over Bore Piston Kit for Ski-Doo MXZ 670 HO & Summit X 670 HO 78.25mm
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SPI .010 Over Bore Piston Kit for Ski-Doo
The SPI .010 over bore piston kit rebuilds Ski-Doo snowmobile engines with an oversized 78.25mm piston for MXZ 670 HO and Summit X 670 HO models.
Overview
This SPI .010 over bore piston kit is designed for Ski-Doo MXZ 670 HO and Summit X 670 HO snowmobiles. It provides a precise 78.25mm bore diameter to restore engine compression and performance. The kit includes a piston, rings, wrist pin, and circlips for a complete rebuild.
Built For Performance
- High-strength aluminum alloy piston for durability
- Precision-machined ring grooves ensure proper sealing
- Oversized 78.25mm bore increases displacement for more power
- Includes wrist pin and circlips for easy installation
- Designed to meet OEM specifications for reliable fit
Fits These Machines
- for Ski-Doo MXZ 670 HO
- for Ski-Doo Summit X 670 HO
On-The-Job Use
- Restores engine performance on trail and mountain snowmobiles
- Ideal for high-mileage engines needing a rebuild
- Commonly used in racing and recreational riding
- Provides a cost-effective alternative to new engine replacement
Specs At A Glance
| Bore Size | 78.25mm |
| Over Bore | .010" |
Good To Know
Q: What is the advantage of an over bore piston kit? A: An over bore piston kit lets you machine the cylinder to a larger diameter, restoring compression and extending engine life without replacing the entire engine.
Q: Do I need to rejet the carburetor after installing this kit? A: Yes, you may need to adjust jetting to accommodate the increased displacement and ensure proper fuel-air mixture.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.
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