520UO O-Ring Motorcycle Chain
seal chain structure
| Pin | The link connecting the outer links is the central axis of the chain bend. |
| Bushing | The chain plate connected to the inside is the supporting force axis of the pin shaft. |
| Roller | Contact with the sprocket to make the chain roll smoothly. |
| Inner/outer chain link | Together with the pin, it supports the transmission of load and power. |
| Seal Ring | Lubricating grease sealed between the pin and the bushing. |
| lubricating oil | Provide lubrication between pins and bushings to prevent wear and elongation. |
Product data information
| Model | unit | 520UO |
| Pitch-（P) | mm | 15.88 |
| Roller Link width（Min.)-(W) | mm | 6.25 |
| Roller Dia(Max.)-(D) | mm | 10.16 |
| Pin Link Plate Thickness-(T1) | mm | 2.20 |
| Inner link plate Thickness-(T2) | mm | 2.20 |
| Inner Link Plate Heinght-(H) | mm | 14.70 |
| Pin Dia-(d) | mm | 5.24 |
| Overall Width Riv-(L) | mm | 20.65 |
| Overrall Width Con-(G) | mm | 21.85 |
| Minimum Tensile Strength | kgf | 3300 |
| Average Tensile Strength | kfg | 3600 |
| Displacement Application(Max) | cc | 400 |
Applications
Our chains are built to last and stand up to the rigors of street and off-road riding. Designed to minimize the need for regular maintenance and extend life, they are a smart investment for any rider.
520UO O-Ring Motorcycle Chain Pre-stressed and pre-stretched for better performance with fewer adjustments, they outperform most of the competitions heavy-duty chains.
Applications
- motorcycle
Product Advantages
●Initial lubrication
●Shock-resistant version
●Low-maintenance
Chart
Frequently Asked Question
“520” refers to the chain size (5/8” pitch and 1/4” roller width), commonly used in mid-size motorcycles. “UO” indicates a special O-ring sealing design for better durability and reduced friction.
Yes. As long as your motorcycle uses 520-size sprockets, this chain will fit. Make sure the number of links matches your bike’s requirements.
O-ring chains have rubber seals between the inner and outer plates to keep lubricant in and dirt out, resulting in a longer lifespan and smoother performance.
Absolutely. The 520UO chain is designed to handle harsh riding environments like dirt, mud, and dust. Its sealed design helps reduce wear even in rough terrain.
While the internal lubrication is sealed, you should still clean and lightly lubricate the chain externally every 300–500 km, or after muddy rides, for optimal performance.
With proper maintenance, it can last anywhere from 15,000 to 25,000 kilometers, depending on riding conditions and habits.
