SPI .020 Over Bore Piston Kit for Ski-Doo fits 1993-1999 670 non-HO Snow 78.5mm

SPI .020 Over Bore Piston Kit for Ski-Doo

This .020 over bore piston kit fits 1993-1999 Ski-Doo 670 non-HO snowmobiles and provides the needed overbore to restore cylinder compression.

Overview

The SPI .020 over bore piston kit is designed for Ski-Doo 670 non-HO snowmobile engines requiring a 78.5mm bore. This piston kit delivers reliable power restoration and is a direct replacement for the original piston assembly. It is the ideal solution for rebuilding your Ski-Doo engine to like-new condition.

Built For Performance

• Precision-machined from high-strength aluminum alloy
• .020 inch overbore for worn cylinder restoration
• Includes rings, wrist pin, and circlips for complete installation
• Matches OEM specifications for 670 non-HO engines
• Tested for durability in snowmobile applications
• Direct fit for 78.5mm bore

Fits These Machines

• for Ski-Doo 670 non-HO snowmobiles (1993-1999)

On-The-Job Use

• Rebuilding Ski-Doo snowmobile engines after top-end wear
• Restoring compression on high-mileage 670 non-HO engines
• Performance rebuilds requiring a .020 overbore

Specs At A Glance

Good To Know

Q: Is this piston kit compatible with a 670 HO engine?A:No, this kit is specifically for the non-HO version; the HO has different port timing and piston design.

Q: Do I need to replace the piston rings with this kit?A:Yes, the kit includes new rings, wrist pin, and circlips for a complete installation.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.