525 120 Motorcycle Chain​

I found that the 525 pitch was just right between weight and tensile strength, making it particularly suitable for medium to large displacement models from 400cc to 1000cc. As for the length of 120 knots, it is actually a “universal size”. You will definitely have to cut a few knots with a chain breaker after buying it to match the original OEM specifications of your motorcycle. For a durable and high-performance chain, I strongly recommend not saving that little money and opting for an X-Ring seal instead of a regular O-Ring. motomax definitely industry benchmarks. Their patented sealing technology can seal lubricating oil inside tightly, reduce friction under high torque, and will not come out easily “dead end”. When installing, be sure to use riveted tabs to achieve permanent connection. Although this requires professional riveting tools, it is absolutely necessary for safety. Also, don’t forget to check your trays for “fin-like” wear. Hanging a new chain on an old one will cut the life of your chain in half at least. It’s a complete waste of money.

Understanding 525 Pitch

“525” These three numbers are not just code names, they define the geometric dimensions of the chain. In the displacement range of 400cc to 1000cc, power output and lightweighting are always in a fight. The 525 chain has significantly more tensile strength than the 520 and can handle the torque of a male upgraded tank, but it is also much lighter than the 530 chain. This balance effectively reduces the drivetrain’s moment of inertia, making the throttle response more responsive while still being able to steadily catch the pull of heavy acceleration.

120 Sections “General Specifications” With Personalized Cropping

The vast majority of street motorcycles and replica races require chains between 110 and 116 knots.

Why buy 120? Quite simply, it leaves plenty of room for riders who have changed the tooth ratio of their sprockets.

Cutting process: A set of chain cutters is necessary to ensure a tight fit. With this tool you can precisely cut off the excess links, perfectly matching the OEM specifications of the motorcycle, ensuring that the rear wheels are in the best position within the adjustment range of the rocker arm.

Sprockets

Brake calipers, sprockets, and chains are available in bulk.

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Caliper Series

Lighter weight、Corrosion resisting 、Sliding resistance

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Chain Series

The brake calipers and sprockets offer excellent performance.

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500X Sprocket

Its yield strength reaches 850 MPa.

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675SR Sprocket

The transmission efficiency has increased by 2.7%.

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520VX2 Series Chain

Cycling scenarios: street, highway motocycle tours, city riding.

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Why The X-Ring Wins Over The O-Ring

The key to long chain life is internal lubrication. While O-Ring was standard for the past few decades, current X-Ring technology has left it behind in every metric.

Their X-type seals have four contact points, while the regular O-type has only two. Under pressure, the X-shaped structure flattens, locking in grease more effectively.

By sealing the lubricant inside and keeping dirt out, these chains significantly reduce friction. This effectively prevents that kind of stiff “dead joints”, and the chain remains flexible even at sustained high torque output.

Professional Installation

Don’t touch those snap-on knobs; they can fall off during high-frequency vibrations or high-speed driving. Riveted links expand the pin head with a riveting tool to create a permanent mechanical connection similar to the factory link. For high-performance riding, this error-proof connection is non-negotiable and directly eliminates the most vulnerable points in the drivetrain that are prone to failure.

A Sprocket Examination That Cannot Be Ignored

The most common mistake many riders make when changing chains themselves is to ignore the tooth tray. Before you hang that shiny new 525 chain, you have to take a good look at the tips of the front and back sprockets to see if there is any “fin-like” wear ——that is, the tips of the teeth have become sharp and thin like hooks.

Putting a new chain on an old sprocket is self-destructive. Because the pitch of the old sprockets has changed and they can’t mesh perfectly with the new chain, this causes friction to increase exponentially. I’ve seen too many cases where the life of a new chain is shortened by 50% because I can’t bear to change the trays. This is a complete waste of investment. For best results, make sure the sprockets are in excellent condition, or simply replace them with this new 120-section chain.

Author: Dave Miller

Having replaced countless drive systems and dealt with my fair share of roadside repairs, I’m passionate about sharing practical, technical advice to help fellow riders maintain their motorcycles safely and efficiently. My goal is to bridge the gap between professional workshop standards and the home garage.