420-104 Drive Chain for Yamaha MX100 1979-1983 MX 100

420-104 Drive Chain for Yamaha MX100

This 420-104 drive chain is a replacement motorcycle chain sized to fit 1979-1983 Yamaha MX100 models, transferring engine power to the rear wheel.

Overview

The 420-104 Drive Chain for Yamaha MX100 is a direct-fit replacement chain built for the 1979-1983 MX100. This drive chain restores reliable power delivery from the countershaft sprocket to the rear wheel on your MX100. Riders maintaining an older machine will find this drive chain a practical swap when the original has stretched or seized.

Built For Performance

• 420 pitch matches the OEM chain size for the MX100
• 104 link count sized for the 1979-1983 MX100 wheelbase
• Roller chain construction for smooth sprocket engagement
• Pre-stretched to reduce initial break-in adjustment
• Corrosion-resistant finish for trail and workshop exposure

Fits These Machines

• for Yamaha MX100 1979
• for Yamaha MX100 1980
• for Yamaha MX100 1981
• for Yamaha MX100 1982
• for Yamaha MX100 1983

On-The-Job Use

• Trail riding on MX100 two-stroke machines
• Replacing a worn out or broken chain at home
• Routine drivetrain service on older motocross bikes
• Restoring a vintage Yamaha MX100 for regular riding

Specs At A Glance

Good To Know

Q: Will this chain fit my 1979-1983 MX100 without cutting? A: It is sized at 104 links for that model range, but confirm the gearing on your bike because sprocket changes can alter required length.

Q: How often should a drive chain be adjusted? A: Check slack before each ride and lubricate regularly, since chains stretch with use and a loose chain can wear both sprockets.

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