KAMIER 420 Drive Chain 102‑Link Gold with Chain Breaker — Kit for 50–125cc Pit Bikes & ATVs

KAMIER's 420 gold drive chain is a 102-link replacement kit that includes a chain breaker and extra master links for straightforward fitting on 50–125cc pit bikes, ATVs, go-karts, and mini motorcycles.

This complete chain kit gives you a ready-to-fit replacement for common Chinese 4-stroke mini bikes and quads. The 420 size is a widely used pitch for small-displacement machines, and this kit is supplied with five master links and a chain breaker tool so you can shorten or lengthen the chain to match front and rear sprockets. The gold finish helps visibility and resists everyday grime while delivering dependable power transfer when installed correctly.

Which machines will this 420 chain fit?

This 102-link chain is intended for many 50cc–125cc mini dirt bikes, ATVs, and go-karts that accept a 420 chain size. It works with several popular models but always check your sprocket size first (both front and rear) before ordering.

• Compatible with CRF50F, XR50R, KLX110, KX65 and similar small dirt bikes.
• Fits PW80, TTR90, TTR110, IT125 and comparable models using a 420 chain.
• Suitable for many 50–150cc 4-stroke Chinese pit bikes, ATVs, quads, and mini motos.
• Note: won’t fit motorcycles that require a 428 rear sprocket.

How do I size and install this 102-link chain?

Installation requires matching sprocket sizes, trimming links to length, and securing a master link. The included chain breaker tool and extra master links let you adjust length and finish installation without additional parts.

• Measure from sprocket to sprocket and compare to chain length; 102 links as supplied may need removing or adding.
• Use the included chain breaker to push out pins and remove excess links safely.
• Install with a supplied master link; ensure clip orientation and torque according to your service manual.
• After fitting, check chain tension, alignment, and re-torque axle and adjusters before riding.

What materials and durability features should I expect?

The chain is built for standard street and off-road use on small-displacement machines and uses a conventional roller-chain design. The gold finish is decorative and helps hide road grime; performance depends on regular maintenance.

• 420 pitch roller chain construction suitable for 50–125cc output levels.
• Gold plating for corrosion resistance and easier visual inspection of wear.
• Supplied with five master links to replace lost fasteners or adapt fitment needs.
• Routine lubrication and adjustment extend chain life—inspect for stretch and stiff links.

What else comes in the package and what should I check after purchase?

The kit includes the 420 chain with 102 links, a chain breaker tool, and five master links. After delivery, verify sprocket compatibility and practice safe installation steps.

• Package contents: one 420 chain (102 links), one chain breaker tool, five master links.
• Confirm front and rear sprocket sizes are 420-compatible; 428 rear sprockets are not compatible.
• Keep extra master links for future repairs or quick replacements while on the trail.
• Test ride gently after installation and re-check tension and fasteners after first few miles.

Who is this for? This KAMIER 420 chain kit is aimed at riders, home mechanics, and small-vehicle owners who need an economical, ready-to-adjust replacement chain for 50cc–125cc pit bikes, ATVs, and go-karts. It's practical for those who prefer to service machines themselves—especially hobbyists who want a complete kit (chain, breaker, master links) to fit and maintain their ride without sourcing multiple parts.