PGN Bearings 420 Motorcycle Chain 10 ft (240 Links) for 100–125cc Bikes - Carbon Steel Single‑Strand with 2 Connecting Links

PGN 420 motorcycle chain is a 10‑foot, 240‑link ANSI #420 single‑strand roller chain built in carbon steel, supplied with two free connecting links for direct fit on 100cc–125cc dirt bikes, ATVs, go‑karts, and mini scooters.

This heavy‑duty replacement chain is engineered for small‑engine drivetrains where a 420 pitch is specified. Its single‑strand roller design and carbon steel construction prioritize dependable power transfer and wear resistance for recreational and light industrial vehicles. Supplied at 10 feet (240 links), the length gives you enough material to size and install the chain yourself or keep spare links for maintenance.

What vehicles and engines will this 420 chain work with?

This chain fits sprockets and drivetrains that require an ANSI #420 pitch and single‑strand roller configuration, commonly found on 100cc, 110cc, and 125cc dirt bikes, pit bikes, ATVs, go‑karts, and mini bikes. Verify your sprocket pitch and width before ordering to ensure compatibility.

• Compatible with 420 pitch sprockets used on small off‑road bikes and quads
• Suitable for chain drives on 100–125cc recreational engines
• Can be shortened or extended by adding/removing links for custom fit
• Includes two connecting links to simplify installation or field repairs

How durable is the chain and what materials are used?

Constructed from carbon steel, this PGN chain balances toughness and cost‑effectiveness for everyday riding and maintenance use. The single‑strand roller layout reduces friction and distributes load across the rollers for consistent power transmission.

• Carbon steel plates and rollers for strength and fatigue resistance
• Heat‑treated pins and plates for improved wear life under load
• Single‑strand design suited to small‑engine torque ranges
• Manufactured to ANSI #420 dimensional standards for interchangeability

How do I measure, cut, and install the 10‑foot chain?

Measure the required length by wrapping the chain around the sprockets and adding a couple of links for tension adjustment. Use a proper chain breaker or pin punch to remove excess links, then secure the ends with the supplied connecting links. Always set chain slack to the vehicle manufacturer’s specification and recheck after a short ride.

• Wrap chain around sprockets to determine trim length and alignment
• Use a chain breaker tool to remove unwanted links cleanly
• Install supplied connecting links and secure with a clip or rivet per instructions
• Adjust tension, lubricate chain, and re‑inspect after initial use

What maintenance keeps this chain running longer?

Regular cleaning, lubrication, and correct tensioning are the most effective ways to extend chain life. Inspect sprockets for wear and replace them in pairs with the chain to prevent accelerated deterioration.

• Clean grit and debris with a suitable brush and solvent periodically
• Apply chain lubricant evenly to rollers and pins after cleaning
• Maintain manufacturer‑recommended slack to avoid premature wear
• Replace sprockets when teeth show hooking or excessive wear

Who is this for: Riders, mechanics, and maintenance teams who need a dependable, affordable 420‑pitch chain for small motorcycles, pit bikes, ATVs, go‑karts, or mini scooters. It’s an ideal choice for owners who prefer to perform their own repairs or keep spare chain stock for field service and maintenance of 100cc–125cc drivetrains.