Kimpex Pro Series Drive Belt for Ski-Doo Alpine 399 ER & R 1970

Kimpex Pro Series Drive Belt for Ski-Doo Alpine 399 ER & R

The Kimpex Pro Series Drive Belt is a replacement snowmobile belt engineered for the Ski-Doo Alpine 399 ER and 399 R, delivering consistent power transfer from the engine to the drive clutch.

Overview

This Kimpex Pro Series Drive Belt is built as a direct replacement drive belt for the Ski-Doo Alpine 399 ER and 399 R snowmobiles. The drive belt transfers engine torque to the secondary clutch, keeping acceleration smooth and predictable on cold starts and long pulls. Riders maintaining a vintage Alpine 399 depend on a drive belt that holds its shape and grip season after season.

Built For Performance

• Pro Series construction designed for consistent power transfer under load
• Reinforced tensile cord resists stretch during hard acceleration
• Heat-resistant rubber compound handles the friction of continuous clutch engagement
• Precise dimensional tolerances for a proper fit on the drive clutch
• Built to endure repeated hot and cold cycling across winter riding seasons

Fits These Machines

• for Ski-Doo Alpine 399 ER, 1970
• for Ski-Doo Alpine 399 R, 1970

On-The-Job Use

• Trail riding and backcountry cruising on vintage Ski-Doo Alpine 399 models
• Utility and work duty where the Alpine 399 hauls loads or tows a sled
• Seasonal maintenance and belt replacement before winter riding begins
• Restoration projects bringing a 1970 Alpine 399 back into service

Specs At A Glance

Good To Know

Q: How do I know when my drive belt needs replacing? A: Signs include glazing, frayed edges, missing cogs, or a belt that has narrowed from wear. A slipping belt that revs without moving the machine is another clear indicator.

Q: Should I check clutch alignment when installing a new belt? A: Yes, misaligned clutches cause rapid belt wear and poor performance. Verify alignment and set the correct belt deflection before riding.

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