SPI .010 Over Bore Top End Repair Kit for Ski-Doo MXZ 670 HO & Summit X 78.25mm

.010 Over Bore Top End Repair Kit for Ski-Doo

This .010 over bore top end repair kit for Ski-Doo provides oversized components to rebuild cylinders that have been bored to 78.25mm, compatible with MXZ 670 HO and Summit X snowmobiles.

Overview

This .010 over bore top end repair kit for Ski-Doo is designed for engines requiring an oversized piston after cylinder boring. The kit for Ski-Doo includes pistons, rings, and gaskets sized at 78.25mm to accommodate a .010 overbore, restoring compression and performance in MXZ 670 HO and Summit X models.

Built For Performance

• Oversized pistons at .010 over factory spec
• Matched ring set for proper sealing
• Includes wrist pins and circlips
• Complete gasket set for the overbore application
• Manufactured to exacting standards for Ski-Doo engines

Fits These Machines

• for Ski-Doo MXZ 670 HO
• for Ski-Doo Summit X

On-The-Job Use

• Rebuilding cylinders that have been overbored due to wear
• Performance restoration for high-mileage snowmobiles
• Trail and mountain riding applications requiring precise fit

Specs At A Glance

Good To Know

Q: Do I need to bore my cylinder to use this kit? A: Yes, this .010 over bore kit requires the cylinder to be machined to 78.25mm for proper piston clearance.

Q: Does this kit match original Ski-Doo specifications? A: The components are manufactured to meet or exceed OEM standards for Ski-Doo 670cc engines, ensuring reliable performance.

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