420-106 Drive Chain for Yamaha GTMX 80 1973-1979 GTMX80

420-106 Drive Chain for Yamaha GTMX 80

This 420-106 drive chain is a replacement chain sized for the Yamaha GTMX 80 and delivers steady power transfer from engine to rear wheel.

Overview

This 420-106 drive chain is built as a direct-fit replacement for the Yamaha GTMX 80, covering model years 1973 through 1979. The 420-106 drive chain keeps power moving from the countershaft sprocket to the rear wheel so the bike accelerates and holds speed as intended. It suits riders maintaining or restoring a GTMX 80 who want a dependable chain in the correct length.

Built For Performance

• 420 pitch matches the stock sprocket sizing on the GTMX 80
• 106-link length configured for the GTMX 80 drive setup
• Roller chain design for smooth engagement with front and rear sprockets
• Steel construction built to resist stretch under regular use
• Pre-sized so it installs without cutting in most cases

Fits These Machines

• for Yamaha GTMX 80 (1973-1979)

On-The-Job Use

• Replacing a worn or stretched chain on a GTMX 80
• Routine drivetrain maintenance on vintage mini bikes
• Restoring a bike that has sat unused for a season or more

Specs At A Glance

Good To Know

Q: How do I know if my chain needs replacing? A: Check for tight spots, kinked links, or a chain that pulls away from the rear sprocket more than a small amount. A worn chain also stretches past the adjuster range on the swingarm.

Q: Should I replace the sprockets at the same time? A: It is good practice to inspect both sprockets when fitting a new chain, since worn teeth accelerate wear on the fresh chain. Replace any sprocket with hooked or sharpened teeth.

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