SPI .040 Over Bore Piston Kit for Ski-Doo MXZ 670 HO & Summit X 670 HO 79mm
SPI .040 Over Bore Piston Kit for Ski-Doo MXZ 670 HO & Summit X 670 HO 79mm
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SPI .040 Over Bore Piston Kit for Ski-Doo MXZ 670 HO & Summit X 670 HO
This aftermarket piston kit provides a .040 over bore for Ski-Doo MXZ 670 HO and Summit X 670 HO snowmobiles, featuring a 79mm piston.
Overview
This SPI .040 over bore piston kit is built to refresh engine performance in Ski-Doo MXZ 670 HO and Summit X 670 HO models. It uses a 79mm bore to restore compression and power. Perfect for rebuilding high-output snowmobile engines.
Built For Performance
- Durable aluminum alloy construction withstands high RPM
- Precision-machined 79mm bore for exact fit
- .040 over sizing accommodates worn cylinders
- Includes piston rings and wrist pin for complete installation
- Engineered for the 670 HO engine platform
Fits These Machines
- for Ski-Doo MXZ 670 HO
- for Ski-Doo Summit X 670 HO
Specs At A Glance
| Bore Size | 79mm |
| Oversize | .040 in |
Good To Know
Q: Will this kit work on other Ski-Doo models with the 670 engine? A: This piston kit is specifically designed for the MXZ 670 HO and Summit X 670 HO; other 670 models may have different bore specifications.
Q: Is a cylinder hone necessary when installing this piston? A: Yes, the cylinder should be honed to the correct finish for the new piston rings to ensure proper break-in and compression.
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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