Kart Chains(697)

The best chain size depends on your sprockets, engine, and how you ride. Go-kart drive chains are typically roller chains, and sizes must match your sprockets.

• #35 chain: Common on many recreational karts and mini bikes. Lightweight and widely available.
• #40/#41 chain: Heavier-duty options used on some kart and utility setups.
• 420/428 chain: Powersports-style chains used on small engines and off-road karts. 428 is typically wider than 420.

Start by checking what’s stamped on your current chain or sprockets. If you’re building or upgrading, choose a matched chain-and-sprocket size. You can find chains in various lengths and connecting links, and trim excess links with a chain breaker as needed.

Both 420 and 428 are motorcycle-style roller chains commonly used on small engines and go-karts. They share a similar pitch, but they differ in width and overall robustness.

• 420 chain: Narrower profile; pairs with 420-specific sprockets.
• 428 chain: Typically wider/heavier than 420; requires 428 sprockets.

Because the widths differ, they’re not interchangeable with the same sprocket. To identify what you have, look for “420” or “428” stamped on the chain side plates or the sprocket. If markings aren’t visible, compare measurements or reference a sizing chart. Matching the chain size to the sprocket helps reduce wear and can improve reliability, especially under higher loads.

A quick inspection usually points you to the right chain.

1. Check markings: Many chains and sprockets are stamped with sizes like #35, #41, 420, or 428.
2. Measure if needed: Verify pitch (pin-to-pin distance) and inner width with a ruler or calipers, then compare to a chain size chart.
3. Match your sprockets: Chain and sprocket series must match. Mixing sizes can cause skipping and accelerated wear.
4. Consider length: Count existing links or buy a longer length and remove extras with a chain breaker.

When in doubt, check your kart’s manual or bring the old chain/sprocket details when shopping so you can match the series and link style.

Go-kart drive chains are typically called roller chains. You’ll see two common labeling systems:

• ANSI-style sizes: Examples include #35, #40, and #41, often used on karts, mini bikes, and machinery.
• Powersports-style sizes: Examples include 420, 428, 520, and 530, often used on small motorcycles, ATVs, and some karts.

Chains connect with a master (connecting) link, and you can also find offset links for fine length adjustments. Don’t confuse drive chains with tire chains, which are separate traction accessories. For a smooth setup, make sure your chain type and sprockets use the same series designation.

Regular care can help extend chain and sprocket life.

1. Clean: Wipe off dirt, then use a chain-safe degreaser and a soft brush. Rinse lightly and dry.
2. Lubricate: Apply a suitable chain lube to the rollers and inner links. Let it set before riding to minimize fling.
3. Adjust tension: Aim for a small amount of slack. Too tight can stress bearings; too loose can skip.
4. Check alignment: Misaligned sprockets accelerate wear—realign if you see uneven polish on teeth.
5. Inspect wear: Replace if links kink, rollers feel gritty, or the chain has stretched noticeably.

Basic tools like a chain breaker, master links, and lube can simplify upkeep.