Motorcycle Chain Size Guide Malaysia: How to Choose the Right Chain

How to Read a Motorcycle Chain Size

A motorcycle chain is usually identified by its chain size and number of links. For example, a marking such as 428-132L shows both the chain size and chain length.

Example: 428-132L

Marking	What It Means
428	The chain size that must match the front and rear sprockets
132L	The chain has 132 links

Some chains also include letters after the size, such as H or a product series name. These letters may describe the chain model, strength or sealed design, depending on the manufacturer.

Do not choose a chain based only on its appearance. The chain size, link count and product type must be suitable for the motorcycle and sprockets.

What Do 415, 420 and 428 Chain Sizes Mean?

415, 420 and 428 are motorcycle chain size codes. They do not show the number of links. These chain sizes have the same 12.7 mm pitch, but they have different inner widths and roller sizes.

Chain Size	Inner Width	Simple Explanation
415	About 4.76 mm	Narrower than 420 and 428
420	About 6.35 mm	Wider than 415
428	About 7.94 mm	Wider and uses a larger roller than 415 and 420

These chain sizes are not interchangeable. The chain must match the front and rear sprockets. A 428 chain should not be fitted to sprockets made for a 415 or 420 chain.

Do not choose a larger chain size simply because it appears stronger. Use the chain size specified for the motorcycle, or confirm that the complete chain and sprocket setup has been properly approved.

How to Check Chain Length and Link Count

The link count shows the total length of the motorcycle chain. For example, 428-132L means the chain is size 428 and has 132 links.

• Check the motorcycle owner’s manual or an official chain fitment guide.
• Check the size and link count of the current chain before removing it.
• Confirm the motorcycle model, year and version.
• Check whether the front or rear sprocket size has been changed.
• Do not choose the link count based only on another motorcycle that looks similar.

The same motorcycle model may use a different chain length depending on the year, version or sprocket setup. Official fitment tables normally list the motorcycle model, year, chain size and recommended number of links together.

A chain that is supplied with extra links may be shortened during installation, but this should be done with the correct tools and connecting link. A chain that is too short should not be forced to fit. When the correct length is unclear, confirm the motorcycle and sprocket details before purchasing.

Standard Chain vs O-Ring Chain

Motorcycle chains are available in standard and sealed designs. An O-ring chain has small rubber rings between the inner and outer plates to help keep lubricant inside the chain joints and reduce dirt entering them.

Chain Type	Main Features	Suitable Consideration
Standard Chain	Simple design, lighter weight and generally lower cost.	Requires regular cleaning, lubrication and adjustment.
O-Ring Chain	Uses rubber O-rings to help retain lubricant inside the chain joints.	Usually offers longer service life but may cost more and requires compatible cleaning products.

An O-ring chain is not automatically suitable for every motorcycle. Check the required chain size, available clearance and manufacturer’s recommendation before changing from a standard chain to an O-ring chain.

Both chain types require correct adjustment and regular maintenance. Avoid harsh cleaning chemicals that may damage the rubber seals of an O-ring chain.

Why the Chain and Sprockets Must Match

The motorcycle chain, front sprocket and rear sprocket work together as one drive system. The chain size must match the sprocket size so that the chain fits correctly on the sprocket teeth.

• The chain size must match both the front and rear sprockets.
• The sprocket teeth should not be badly worn, bent or damaged.
• The front and rear sprockets should be correctly aligned.
• The chain must be adjusted to the correct tension.
• A new chain should not be installed on badly worn sprockets.

Worn sprocket teeth may not hold a new chain correctly. This can cause uneven movement, noise and faster wear on the new chain.

When replacing a worn chain, inspect both sprockets at the same time. If the sprockets are worn or damaged, replacing the chain and sprockets together can help the new parts work correctly and last longer.

KMC Practical Chain Fitment Checklist

Before buying a motorcycle chain, prepare the correct motorcycle, chain and sprocket information. This helps reduce fitment mistakes and makes it easier to confirm the suitable chain.

• Motorcycle brand and model
• Motorcycle year and version, if known
• Current chain size, such as 415, 420 or 428
• Current chain link count
• Front sprocket tooth count
• Rear sprocket tooth count
• Standard chain or O-ring chain requirement
• Whether the motorcycle or sprocket setup has been modified
• Required quantity

A clear photo of the current chain marking and both sprockets can also help. Make sure the chain size, sprocket condition and tooth counts can be seen clearly.

Do not confirm chain fitment based only on the motorcycle model name. The correct chain length may vary according to the year, version and sprocket setup. Check the current specifications before purchasing.

Common Motorcycle Chain Selection Mistakes

Choosing a motorcycle chain based only on price, appearance or chain size can lead to poor fitment and faster wear. The chain must match the motorcycle, sprockets and required link count.

• Choosing the correct chain size but the wrong number of links.
• Using a 415, 420 or 428 chain with sprockets made for another chain size.
• Buying a chain based only on the motorcycle model without checking the year or sprocket setup.
• Assuming that a larger chain is always stronger or more suitable.
• Installing an O-ring chain without checking clearance and compatibility.
• Shortening a chain without using the correct tools and connecting link.
• Installing a new chain on badly worn sprockets.
• Adjusting the chain too tightly or leaving it too loose.
• Using unsuitable cleaners or lubricants on a sealed chain.

Before installation, confirm the chain size, link count, sprocket tooth counts and chain type. The chain should also be installed, aligned and adjusted correctly by someone with suitable tools and experience.

When Should the Chain and Sprockets Be Replaced?

The motorcycle chain and sprockets should be replaced when they are worn, damaged or no longer working smoothly. Regular inspection helps reduce the risk of poor performance or chain failure.

• The chain has become too loose even after adjustment.
• The chain has tight spots, stiff links or uneven movement.
• The chain shows heavy rust, damaged plates or missing O-rings.
• The chain makes unusual noise during riding.
• The sprocket teeth are worn, bent, sharp or uneven.
• The chain often requires adjustment within a short period.
• The chain and sprockets have reached the replacement limit stated by the manufacturer.

When replacing a worn chain, inspect both the front and rear sprockets. Installing a new chain on worn sprockets may cause the new chain to wear faster.

For best results, replace the chain and worn sprockets as a complete set. After installation, make sure the chain is correctly aligned, adjusted and lubricated.

Motorcycle Chains Available from KMC Motor Parts

KMC Motor Parts offers motorcycle chains for different motorcycle models, chain sizes and link counts. Product availability may vary according to brand, specification and current stock.

• 415, 420 and 428 motorcycle chains
• Different chain link counts
• Standard motorcycle chains
• O-ring motorcycle chains
• Chains for different motorcycle and sprocket setups

Before choosing a chain, check the motorcycle model, year, current chain size, link count and sprocket tooth counts. Customers can browse our motorcycle chain catalogue and contact KMC Motor Parts to confirm suitability, stock and current price.

Frequently Asked Questions

Can I use a 428 chain on a motorcycle that uses a 415 chain?

Normally, no. A 428 chain is wider and must be used with sprockets made for a 428 chain. Do not fit it to 415 sprockets. Changing the chain size requires a compatible front sprocket, rear sprocket and enough clearance on the motorcycle.

How do I know the correct chain length for my motorcycle?

Check the motorcycle owner’s manual, an official fitment guide or the marking on the current chain. Also confirm the motorcycle year, version and front and rear sprocket tooth counts, because a changed sprocket setup may require a different number of links.

What is the difference between a standard chain and an O-ring chain?

A standard chain has a simpler design and usually requires more frequent cleaning and lubrication. An O-ring chain uses rubber seals to keep lubricant inside the chain joints, which can help reduce wear and extend service life when maintained correctly.

Can I replace the chain without replacing the sprockets?

It may be possible when both sprockets are still in good condition. However, worn or damaged sprockets can cause a new chain to wear faster. Inspect the front and rear sprockets before installing a new chain.

Can extra chain links be removed?

Yes, some motorcycle chains are supplied with extra links and can be shortened during installation. The work should be done with the correct chain tools and a suitable connecting link. A chain that is too short should never be forced to fit.

How do I know which motorcycle chain suits my bike?

Check the motorcycle model, year, chain size, link count and front and rear sprocket tooth counts. Also confirm whether the motorcycle requires a standard chain or an O-ring chain. When the specification is unclear, provide clear photos of the current chain and sprockets before purchasing.