Front Track Drive Sprocket for Ski-Doo TNT 399 600 669 1968-1969

Front Track Drive Sprocket for Ski-Doo

This front track drive sprocket is a direct-fit replacement for Ski-Doo snowmobiles, delivering reliable power transfer from the drive axle to the track for consistent forward motion on the snow.

Overview

This front track drive sprocket is built to replace a worn or damaged drive sprocket on Ski-Doo snowmobiles, restoring proper track engagement and dependable drivetrain performance. The sprocket meshes with the internal track lugs to convert axle rotation into ground-pulling traction, making it a critical wear component for vintage sled owners. It suits riders and restorers keeping these classic Ski-Doo machines running strong season after season.

Built For Performance

• Precision-formed teeth for consistent track lug engagement
• Durable construction built to handle repeated drivetrain torque loads
• Direct replacement design matching the original mounting configuration
• Resists wear from constant contact with the track drive lugs
• Balanced profile to reduce vibration at speed

Fits These Machines

• for Ski-Doo TNT 399, 1968-1969
• for Ski-Doo TNT 600, 1968-1969
• for Ski-Doo TNT 669, 1968-1969

On-The-Job Use

• Replacing a stripped or cracked sprocket during track service
• Restoring vintage snowmobile drivetrains
• Trail riding on classic Ski-Doo sleds
• Seasonal maintenance of drive axle assemblies

Specs At A Glance

Good To Know

Q: Do I need to replace sprockets in pairs? A: It is generally recommended to replace drive sprockets as a set so both sides wear evenly and the track stays aligned. Running one new sprocket against a worn one can cause uneven track tension.

Q: How do I know if my sprocket needs replacing? A: Common signs include missing or rounded teeth, visible cracks, and the track slipping or ratcheting under acceleration. Inspect the sprocket whenever the track or drive axle is serviced.

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