LKSM 420 Motorcycle Chain 132 Link with Chain Breaker

LKSM 420 Motorcycle Chain (132 links) is a heavy-duty 420 standard roller chain kit that includes a 420–530 chain breaker and connector links for direct replacement on many 50–125cc minibikes, scooters, ATVs and go-karts.

This kit is built to restore reliable power transfer and drivetrain durability on small-displacement machines. Made from heat-treated carbon steel with hardened links and rollers, the LKSM 420 chain is sized for 420-type drivetrains and supplied with a universal chain breaker and six connector links so you can cut, fit and join the chain to the exact length your vehicle requires. Check your vehicle’s chain pitch and required link count before fitting.

How does this chain improve drivetrain reliability?

The LKSM 420 chain uses heat-treated rollers and hardened side plates to resist stretching and abrasive wear under repeated load cycles. Consistent manufacturing tolerances ensure smoother engagement with sprockets, which reduces vibration and premature wear on both chain and gears.

• Heat-treated carbon steel construction for increased fatigue life
• Hardened rollers and links to slow wear and elongation
• Precision-cut 420 pitch links for accurate sprocket mesh
• Includes connector links to form a secure master link

Will this fit my 50–125cc bike, ATV or go-kart?

The chain is a 420 standard roller chain with 132 links before trimming, which suits many 50cc–125cc machines such as older CRF50/70/80 and XR50/70/80 models and comparable minibikes or quads. Always confirm your vehicle’s required chain pitch (420), center-to-center distance and final link count before installation.

• 132 links supplied—cut to fit with the included chain breaker
• Compatible with common 420-spec minibike and small motorcycle sprockets
• Works with many Honda CRF/XR small-displacement models and similar machines
• Universal connector links provided for secure assembly

What tools and steps are required to install this chain?

The package includes a 420–530 chain breaker tool capable of removing links and punching pins, plus connector links for reassembly. Installation involves measuring the needed link count, breaking the supplied chain to that length, fitting around sprockets and joining with the connector link; final tightening and a short break-in ride are recommended.

• Included chain breaker removes excess links to exact length
• Connector links supplied for mechanical reattachment
• Basic tools needed: wrench set, torque wrench, and lubricant
• Inspect sprockets and replace if worn before installing new chain

How should I maintain the LKSM 420 chain for longest life?

Routine cleaning, proper tensioning and regular lubrication will maintain performance and extend service life. After the initial break-in period, check chain slack and lube intervals depending on riding conditions; dusty or wet environments require more frequent attention.

• Lubricate after the first 50–100 km and regularly thereafter
• Keep correct chain tension for reduced wear and safer handling
• Clean grit and debris from rollers and sprocket teeth before lubrication
• Replace sprockets if teeth show hooking or uneven wear

Who is this for: This LKSM 420 chain kit is aimed at mechanics, hobbyists and owners of minibikes, scooters, ATVs and mini-motos with 420 pitch drivetrains who need a robust, serviceable replacement chain. It’s ideal if you want a full kit—long 132-link length, connector links and a chain breaker—to cut to the exact length on-site and restore reliable power transfer without sourcing multiple parts separately. Confirm your vehicle’s chain pitch and sprocket condition before purchase to ensure compatibility.