040 Over Pistons Pair for Ski-Doo GSX 380 2005-2006 Snowmobile

0.040 Over Pistons for Ski-Doo GSX 380

This pair of 0.040 in over pistons for Ski-Doo GSX 380 snowmobiles replaces worn or scored originals and restores lost compression to the 380 twin.

Overview

This 0.040 over piston set fits Ski-Doo GSX 380 models from 2005 to 2006 and is sized for cylinders that have been bored and honed past the stock bore. The 0.040 over pistons for Ski-Doo GSX 380 rebuild pistons help bring a tired top end back to spec. Riders and rebuilders working on these machines will find these pistons a direct-fit option for oversized top end work.

Built For Performance

• Oversize 0.040 in bore sizing for cylinders that have been bored and honed beyond stock diameter
• Sold as a matched pair to service both cylinders of the 380 twin in one rebuild
• Manufactured to factory-style dimensions for a proper fit in oversized bores
• Built to hold up under the heat and load of fan-cooled two-stroke operation
• Suited to top end rebuilds where cylinders have been cleaned up past stock size

Fits These Machines

• for Ski-Doo GSX 380, 2005-2006

On-The-Job Use

• Top end rebuilds on Ski-Doo GSX 380 snowmobiles
• Refreshing a 380 twin after a cylinder bore and hone
• Restoring compression on a high-mileage trail sled
• Oversize rebuilds where stock bore pistons no longer fit

Specs At A Glance

Good To Know

Q: Do these pistons drop into a stock cylinder? A: No, the 0.040 in oversize sizing requires the cylinder to be bored and honed to match first. Always measure bore clearance before assembly.

Q: Is a pair enough for my machine? A: Yes, these are sold as a matched pair and cover both cylinders of the 380 twin. Order one set per engine rebuild.

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