KAMIER 420 Drive Chain Kit 102-Link Gold — Fits 50–150cc Pit Bikes, Includes Breaker & Master Links

The KAMIER 420 drive chain is a 102-link gold replacement chain kit with a chain breaker tool and spare master links designed to fit many 50cc–125cc pit bikes, mini dirt bikes, ATVs and go-karts.

This complete chain kit gives owners of small-displacement off-road and recreational machines a ready-to-install replacement: a durable 420-format chain in a high-visibility gold finish, a handheld chain breaker for sizing, and multiple master links for secure joining. The kit supports a wide range of Chinese and popular mini-bike models and makes it easy to tailor the chain length on the spot.

Which machines will this 420 chain fit?

The KAMIER 420 chain is sized specifically for 420 front and rear sprockets and is intended for 50cc through 150cc 4-stroke engines commonly found on pit bikes, mini dirt bikes, ATVs, and go-karts. It is compatible with numerous models including CRF50F, XR50R, KLX110, KX65 and TTR110, but it will not fit a 428 rear sprocket. Always check your sprocket tooth profile and pitch before installing.

• Fits 420 front and rear sprockets only — not compatible with 428 rear sprockets.
• Common matches: CRF50F, XR50R, KLX110, KX65, TTR90/TTR110, DR-Z110 and similar.
• Designed for 50cc–150cc 4-stroke small bikes, ATVs, quads, and go-karts.
• Useful for many Chinese-made models like SSR, TaoTao and Coolster.

How do I size and install the chain for my bike?

The kit includes a chain breaker tool so you can remove or add links to reach the correct length. Measure with the rear axle in its normal operating position, then break or add links until the chain matches your sprocket alignment and tension requirements. Use the supplied master links to reconnect and secure the chain.

• Measure span with rear wheel at normal sag — not fully compressed or extended.
• Use the chain breaker tool to remove excess links cleanly and safely.
• Install a master link, then press and secure per manufacturer guidance.
• Check alignment and tension, then re-torque axle and recheck after a short ride.

What comes in the package and what are the chain specs?

Inside the box you’ll find a gold-finished 420 chain with 102 links, a handheld chain breaker tool, and five master links so you can adjust and fasten as needed. The chain is made to standard 420 pitch with 51 internal and 51 external links, giving flexibility to trim for many small-transport applications.

• Chain: 420 format, 102 links total (51 internal + 51 external).
• Accessories: 1 chain breaker tool and 5 master links included.
• Finish: gold plating for corrosion resistance and high visibility.
• Note: link count may need adjustment depending on specific motorcycle models.

How should I maintain the new chain for longevity?

Regular cleaning, lubrication, and correct tensioning keep the chain running smoothly and extend life. Inspect master links and rivets after the first few rides and periodically afterward; re-tighten and relube according to riding conditions. Avoid aggressive pressure washing and replace the chain if you notice excessive wear or elongation.

• Clean grit and debris with a brush and suitable degreaser before lubrication.
• Use a chain lube designed for off-road chains; apply to rollers and O-rings if present.
• Check tension and alignment after the initial break-in ride and every few rides.
• Replace chain if elongation, stiff links, or damaged rollers appear.

Who is this for: The KAMIER 420 102-link gold chain kit is aimed at hobbyists, mechanics and owners of pit bikes, mini dirt bikes, ATVs, quads and go-karts who need a ready-to-adjust replacement chain. It’s especially useful for riders of 50cc–125cc machines and those working with Chinese-made models (SSR, TaoTao, Coolster) that share 420 sprocket standards, plus anyone who prefers a visible gold finish for easier inspection and a complete kit that includes a breaker tool and spare master links.