MRELC 420 Motorcycle Chain Kit 132-Link 59" Full-Length with Chain Breaker & 10 Connectors for 50–212cc Pit Bikes, Go-Karts, ATVs

MRELC’s 420 motorcycle chain kit is a 132-link, versatile replacement chain with a chain breaker and connector links designed to fit small-displacement ATVs, pit bikes, go-karts and mini bikes.

If you need a durable, adjustable drive chain for Chinese and popular small-displacement powersports machines, this MRELC 420 chain kit supplies a full-length 59" chain (132 links), tools and extra connector links so you can size and install it yourself. The package includes a chain breaker tool and ten 420 connector links to simplify shortening or repairing the chain on-site. Specs such as 1/2" pitch and 1/4" roller width make it compatible with many 50cc–212cc applications, but always verify measurements against your sprockets before installation.

How do I know this chain fits my bike or ATV?

Compatibility centers on chain size, pitch and the number of links you need after trimming. The MRELC 420 is a 1/2" pitch, 1/4" roller width chain commonly used on 50–125cc and some 212cc small engines; it’s supplied long so you can remove links for the correct fit.

• Chain type: 420 (1/2" pitch, 1/4" roller width)
• Length: 59" total with 132 links (66 internal + 66 external)
• Includes 10 connector links to fasten trimmed ends
• Measure current chain pitch and sprocket thickness before purchase

What tools and parts come with the chain kit?

The kit arrives ready for basic installation and adjustment. It contains a chain breaker tool suited for 420–530 chains, ten connector links, and the full-length chain so you can shorten and rejoin the loop without sourcing extra hardware.

• 1 x 420 roller chain (132 links)
• 1 x chain breaker capable of 420–530 chains
• 10 x 420 connector (master) links included
• No extra pins or rivets required beyond the connectors provided

How durable and adjustable is this replacement chain?

The chain is built for routine powersports use and can be sized by removing links to match your drivetrain. While not a lifetime component, it performs well under typical loads for pit bikes, small ATVs and go-karts when installed and tensioned correctly.

• Removable links let you customize length to your vehicle
• Chain breaker supports multiple chain sizes for repairs
• Roller diameter and sprocket thickness match common small-engine setups
• Extra connector links reduce downtime during replacement

Who this is for: The MRELC 420 chain kit is aimed at do-it-yourself mechanics, hobbyists and small-vehicle owners who run 50cc–125cc dirt bikes, 110–125cc ATVs, 212cc go-karts or similar Chinese-manufactured and aftermarket-powered machines. Choose this kit if you want a full-length chain you can trim, a compatible chain breaker for on-site adjustments, and spare connector links so you can finish installation without extra parts. Always cross-check chain pitch and sprocket dimensions with your vehicle before installing; professional installation is recommended if you’re unsure about measuring or riveting chains.