520-102 O-Ring Drive Chain for Yamaha MX250 1973-1974

O-Ring Drive Chain for Yamaha MX250

This 520-102 O-ring drive chain is a 102-link sealed chain sized for the Yamaha MX250, sealing lubricant in and keeping grit out for longer drivetrain life.

Overview

This 520-102 O-ring drive chain is made as a replacement for the Yamaha MX250 and brings sealed construction to a classic motocross drivetrain. The 520-102 O-ring drive chain uses the standard 520 pitch with 102 links, matching the original length while O-ring seals hold grease at the pins and block out dirt. It is aimed at vintage MX250 owners who want a longer-lasting chain than a standard roller design.

Built For Performance

• 520 pitch sealed chain matched to the Yamaha MX250 drivetrain
• 102-link length sized as a direct replacement for the original chain
• O-ring seals retain lubricant at the pins and bushings
• Sealed design keeps dirt and water out for longer service life
• Heat-treated pins and rollers for dependable wear resistance
• Supplied with a master link for straightforward installation

Fits These Machines

• for Yamaha MX250 1973
• for Yamaha MX250 1974

On-The-Job Use

• Trail riding and vintage motocross on the Yamaha MX250
• Drivetrain rebuilds where longer chain life is wanted
• Replacing a stretched or worn-out chain
• Riding in dusty or wet conditions where sealed chains shine

Specs At A Glance

Good To Know

Q: Does this chain include a master link? A: Yes, this 520-102 O-ring drive chain comes with a master link so it can be fitted without special tools. Q: Is an O-ring chain wider than a standard chain? A: Yes, the seals add width, so check clearance at the countershaft sprocket and chain guard on your Yamaha MX250 before ordering.

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