Motorcycle chains play a critical role in transferring engine power to the rear wheel. At Hex Autoparts, Max Motosports design motorcycle chains and sprockets that deliver reliable performance, durability, and value for riders across street, off-road, and ATV applications. Choosing the right chain size, maintaining it properly, and knowing when to replace or upgrade can significantly improve performance, safety, and riding comfort. This guide covers everything you need to know—from chain sizes to maintenance tips and common chain & sprocket issues.
Types of Motorcycle Chains
A motorcycle chain works together with the front (countershaft) sprocket and rear sprocket to deliver power. The most common chain types are:
Standard (Non O-Ring) Chains: Lightweight, affordable, but require frequent maintenance.
O-Ring Chains: Rubber O-rings retain lubricant, offering longer life and less maintenance.
X-Ring Chains: Improved sealing and reduced friction compared to O-ring chains.
Chain size, material quality and tensile strength all affect durability and performance.
What Motorcycle Chain Size Do I Need?
Motorcycle chain sizes are standardized by a three-digit number (e.g., 420, 428, 520). Each size refers to the chain pitch and width, which must match your sprockets.
Common Chain Sizes
Typically used on small-displacement motorcycles, pit bikes, and mini bikes. Lightweight and efficient for low-power engines.
Common on 125cc–250cc motorcycles and small street bikes. Stronger than 420, suitable for daily riding.
One of the most popular sizes for street bikes, dirt bikes, and ATVs. Offers a good balance of strength, weight, and performance. Many riders choose to upgrade to a 520 chain for its balance of strength, weight, and durability.
Designed for larger displacement motorcycles with higher torque. Common on sport bikes and touring motorcycles.
Heavy-duty chain used on high-horsepower bikes, cruisers, and performance applications where durability is critical.
Tip: Always match the chain size to both front and rear sprockets. Changing chain size requires changing sprockets as well.
Motocycle Chain Maintenance Tips
Regular maintenance helps extend chain and sprocket life while improving ride safety and performance.
-Keep sprockets in good condition and properly aligned to ensure smooth and even power delivery
-Use a chain lubricant designed for your specific chain type (standard, O-ring, or X-ring)
-Avoid harsh chemicals such as gasoline or benzene—use mild degreasers or dedicated chain cleaners only
-Lubricate the chain every 300–350 miles, or more frequently in wet, dusty, or off-road conditions
-Replace the chain immediately if it comes into contact with battery acid, as corrosion can weaken internal components
-If exposed to salt water or road salt, allow the chain to dry completely, then clean and re-lubricate thoroughly
When Should You Replace Your Chain and Sprockets?
You should consider replacing your motorcycle chain if you notice any of the following signs:
-Excessive chain stretch that prevents proper adjustment
-Tight spots or stiff links that cause uneven movement
-Visible rust, corrosion, or damaged O-rings
-Hooked or worn sprocket teeth, which often indicate the chain is near the end of its service life
Should Chain And Sprockets Be Replaced Together On A Motorcycle?
Yes, it is necessary to change the chain and sprockets at the same time, as replacing just one will cause premature wear on the new component and lead to poor performance. A worn sprocket will damage a new chain, and a worn chain will quickly wear down new sprockets, so replacing them together ensures the entire system is new and allows for even wear. This is why many riders prefer complete chain and sprocket kits for replacements.
Recomman Reading: Why You Should Replace Your Chain And Sprockets Together
Upgrading Your Chain & Sprockets
-Performance Upgrades
Smaller front sprocket or larger rear sprocket = quicker acceleration
Larger front sprocket or smaller rear sprocket = higher top speed
-Durability Upgrades
Upgrade to O-ring chains
Choose higher tensile strength chains for aggressive riding. Upgrades should always align with your riding style and engine output.
Common Motorcycle Chain Problems and How to Fix Them (420 / 428 / 520 / 525 / 530)
Chain Stretch (Chain Wear) | Excessive Chain Noise | Tight Spots in the Chain | |
Symptoms | -Chain requires frequent adjustment -Difficulty maintaining proper chain slack -Uneven tension when rotating the rear wheel
| -Grinding, rattling, or clicking sounds -Noise increases during acceleration or deceleration
| -Uneven chain slack when rotating the wheel -Jerky throttle response -Vibration at low speeds
|
Causes | -Normal wear over time -Lack of lubrication -High-load riding conditions (off-road, aggressive riding)
| -Dry or poorly lubricated chain -Incorrect chain tension -Misaligned rear wheel
| -Uneven internal wear -Rust or corrosion -Old or poorly maintained chain
|
How to Fix It | Check chain slack at multiple points If the chain has reached its adjustment limit, replace the chain Always inspect sprockets at the same time—worn sprockets accelerate chain stretch.
| -Clean the chain with a mild degreaser or chain cleaner -Apply a motorcycle-specific chain lubricant -Adjust chain tension according to manufacturer specifications -Verify rear wheel alignment
| -Rotate the rear wheel and identify the tightest section -Adjust chain tension based on the tightest spot -If tight spots remain, replace the chain to prevent sprocket damage
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More details about common motorcycle chain problems and what you can do to fix or prevent them, visit: Common Motorcycle Chain Problems and How to Fix Them
Final Thoughts
Choosing the correct motorcycle chain size, maintaining it regularly, and upgrading when necessary can greatly improve your riding experience. Whether you're running a 420 chain on a mini bike or a heavy-duty 530 chain on a high-performance motorcycle, proper care ensures safety, efficiency, and long-term reliability.
Hex Autoparts offers a complete range of motorcycle chains and sprocket kits designed to meet the demands of daily riding, off-road adventures, and high-performance applications. If you're looking for dependable replacement chains or complete chain and sprocket kits, explore the Max Motosports lineup available at hexautoparts.com.
