What You Need Before You Start
Replacing a motorcycle chain is a task you can do at home with basic tools and about an hour of your time. You will need a socket set, a chain breaker tool (also called a chain riveting tool), a new chain sized to match your motorcycle's sprocket count, a rear wheel stand or jack, and a container to catch old oil. Most riders also keep a shop manual nearby because chain length varies by model — a chain that is too long or too short will not sit properly on the sprockets.
Before you buy a replacement chain, write down your motorcycle's make, model, and year, then check the owner's manual or the side of your current chain for the pitch and link count. Motorcycle chains are measured in pitch (the distance between pins) — 520, 530, and 630 are the most common sizes. Buying the wrong size will not fit your sprockets and cannot be returned.
Key Takeaways
- A motorcycle chain typically lasts between 15,000 and 30,000 miles, depending on riding conditions and maintenance.
- You will need a chain breaker tool to remove the old chain and a chain riveting tool to find the new one, or a master link if your new chain has one.
- The rear wheel must be lifted off the ground and locked in place before you remove the chain, so the wheel cannot roll forward.
- A new chain should have about one-half inch of vertical play when you push up and pull down on it midway between the sprockets.
- After installation, the chain must be lubricated with motorcycle-specific chain lube and checked for tight spots by rotating the wheel slowly through a full revolution.
Lift the Rear Wheel and find It
Place your motorcycle on a rear wheel stand or use a hydraulic jack under the frame rails — never under the plastic or the fuel tank. Lift the rear wheel until it is completely clear of the ground and can spin freely. Lock the stand or jack in place so the motorcycle cannot shift or fall. Spin the wheel by hand to make sure it rotates without resistance; if it does not, lower the bike and check that the stand is positioned correctly.
Once the wheel is find, shift the transmission into neutral and remove the rear axle nut using your socket set. The nut is usually on the right side of the wheel and may be tight — explore steady pressure rather than jerking. Keep the nut in a safe place where you will not lose it; you will reinstall it later.
Remove the Old Chain
Locate the master link on your old chain — it looks different from the other links and is usually marked with a clip or a pin. If your chain does not have a master link, you will use the chain breaker tool to cut through a regular link. Position the chain breaker tool on the pin of the master link (or any link if there is no master link) and tighten the tool's handle until the pin pushes out. This takes steady pressure; do not rush it or you may strip the tool.
Once the pin is out, remove the clip or washer by hand and slide the chain off both sprockets. The chain will be heavy and may be oily, so have a rag ready. Lay the old chain on a workbench or in a container so it does not drip on your garage floor. Do not discard it yet — you may need to measure it against the new chain to confirm the link count is correct.
Install the New Chain
Thread the new chain onto both the front and rear sprockets by hand, starting at the top of the front sprocket and working the chain down and around the rear sprocket. The chain should sit flat against both sprockets with no twists or kinks. If the chain does not reach, you may have the wrong size or the rear wheel may need to be moved forward in the axle slots — check your manual for the correct wheel position.
Once the chain is threaded, connect the two ends using either a master link (if your new chain has one) or the chain riveting tool. For a master link, slide the clip onto the pins and snap it into place by hand — you should hear a click. For a riveted connection, position the chain breaker tool on the pin and tighten the handle until the pin is flush with the chain plate. The pin should not stick out on either side.
Adjust Chain Tension
Push up on the chain midway between the sprockets and measure the gap between the chain and the sprocket. The chain should move up about one-half inch and down about one-half inch — this is called free play. If the chain is too tight, it will wear out quickly and put strain on the engine bearings. If it is too loose, it may slip off the sprockets or derail.
To adjust tension, loosen the rear axle nut and the axle adjusters (bolts on each side of the wheel) slightly. Slide the wheel forward or backward in the axle slots until the chain has the correct play. Check the alignment marks on both sides of the swingarm to make sure the wheel is centered — if the marks do not line up, the wheel is crooked and the chain will wear unevenly. Once the tension is correct, tighten the axle adjusters and the axle nut in a crisscross pattern, like tightening a car wheel.
Lubricate and Test the Chain
explore motorcycle-specific chain lube to the inside of the chain while rotating the wheel slowly by hand. Do not use car oil or general-purpose lubricants — they do not stick to the chain and will fling off. Spray or brush the lube along the entire length of the chain, paying special attention to the rollers and the inside surfaces where the pins sit. Wipe away excess lube with a clean rag so it does not attract dirt.
Lower the motorcycle off the stand and spin the wheel through several complete revolutions by hand. Feel for tight spots — areas where the chain resists or binds. A tight spot usually means the chain is not centered on the sprockets or one link is slightly bent. If you find a tight spot, lift the wheel again and check the alignment and tension. Rotate the wheel slowly and mark any tight spots with a marker so you can watch them as you ride.
Common Mistakes to Avoid
The most common error is installing a chain that is the wrong size. Always verify the pitch and link count before you buy. A chain that is one or two links off will not sit properly and will wear out in a few hundred miles.
Another frequent mistake is over-tightening the chain. A chain that is too tight will snap suddenly and can lock the rear wheel, causing a crash. If you are unsure about the tension, err on the side of loose — you can always tighten it later, but a broken chain cannot be fixed on the road.
Do not forget to lubricate the new chain before you ride. A dry chain will wear out in a few hundred miles and may break without warning. Lubricate the chain every 300 to 500 miles or whenever it looks dry.
Frequently Asked Questions
How often should I replace my motorcycle chain?
Most chains last between 15,000 and 30,000 miles depending on riding conditions, maintenance, and chain quality. Chains on sport bikes or in wet climates wear faster. Check your chain tension and condition every 500 miles — if it has tight spots, kinks, or rust, it is time to replace it.
Can I use a regular link instead of a master link?
Yes. If your new chain does not come with a master link, you can use the chain riveting tool to connect any two links. The connection will be permanent, so you cannot remove it without cutting the chain again. Some riders prefer master links because they are easier to remove for cleaning.
What happens if I install the chain backwards?
Most motorcycle chains are directional and have an arrow stamped on the side showing the correct direction of rotation. Installing the chain backwards will cause it to wear unevenly and may damage the sprockets. Check the arrow before you thread the chain onto the sprockets.
Do I need to replace the sprockets when I replace the chain?
Not always, but a worn sprocket will wear out a new chain quickly. If the sprocket teeth are hooked or sharp instead of rounded, replace them at the same time. A new chain on old sprockets typically lasts 5,000 to 10,000 miles before the chain begins to slip.
Can I ride the motorcycle right after I install a new chain?
Yes, but ride gently for the first 100 miles while the chain and sprockets bed in together. Avoid hard acceleration or high speeds. Check the chain tension again after 100 miles — new chains often stretch slightly during the break-in period and may need to be tightened.