EK
EK 520 SRO6 O-Ring Chain – 120 Link
EK 520 SRO6 O-Ring Chain – 120 Link
A durable, sealed 520-pitch drive chain suitable for the Surron Ultra Bee, Talaria Komodo and other motorcycles or e-motos using a 520 chain.
The EK 520 SRO6 is supplied with 120 links, allowing it to be shortened to the correct length for your bike, wheel and sprocket setup. It uses sealed O-rings to retain lubricant around the chain pins while helping to keep dirt, water and other contaminants out.
Why choose an O-ring chain?
- Longer service life than a basic non-sealed chain
- O-rings help retain factory-applied lubricant around the pins and bushings
- Improved protection against dirt, dust, mud and water
- Smoother, more consistent power delivery
- Well suited to trail, farm, road and general off-road riding
Specifications
| Brand | EK Chains |
| Model | 520 SRO6 |
| Chain pitch | 520 |
| Length | 120 links – shorten to suit |
| Seal type | O-ring |
| Master link | SKJ clip-style master link included |
| Construction | Heat-treated steel with lightening holes |
| Tensile strength | Approximately 8,500 lb |
E-moto fitment
- Surron Ultra Bee X, R and HP: Uses a 520-pitch rear drive chain. The standard Ultra Bee chain is approximately 96 links, so this chain must be shortened to suit.
- Talaria Komodo: Uses a 520-pitch rear drive chain. Required length can vary depending on the model, sprocket and wheel setup.
- May also suit other motorcycles and e-motos that use a 520-pitch chain.
Important: Compatibility is determined by chain pitch and required link count, not simply by the make of the bike. Always confirm your existing chain size and required length before cutting the new chain.
Why is it supplied with 120 links?
The chain is intentionally supplied longer than required for most e-moto applications. This allows it to be shortened to match different front and rear sprocket combinations.
A chain breaker or suitable chain tool will be required to remove the excess links. Once shortened, the included master link is used to join the chain.
Not suitable for
This is not a standard replacement chain for bikes using a 420-pitch rear chain, including most Surron Light Bee X, Talaria Sting, Talaria XXX and Ventus One Plus configurations.
Installation advice
Professional installation is recommended. The chain must be shortened correctly and installed with the correct chain tension, wheel alignment and master-link orientation.
Inspect the front and rear sprockets before fitting a new chain. A new chain installed on heavily worn, hooked or damaged sprockets can wear prematurely and may not run correctly.
Chain maintenance
- Check chain tension regularly and adjust it to the bike manufacturer’s specification
- Clean using products suitable for sealed O-ring chains
- Lubricate regularly, particularly after washing or riding in wet and muddy conditions
- Inspect the master link, rollers and O-rings for damage or excessive wear
Not sure whether this chain will fit your bike or sprocket setup? Contact Shock Moto before ordering and we’ll help confirm the correct chain pitch and required length.
Shipping & Delivery
Shipping & Delivery
Click & Collect (Free)
Pick up your bike from our Wellington store once your order is ready. We’ll contact you to arrange a convenient collection time.
Nationwide Delivery (Mainfreight)
We ship bikes across New Zealand using Mainfreight’s motorcycle freight network.
Shipping typically ranges between $100 and $300, depending on your location and whether the bike is shipped boxed or assembled.
Once your order is placed, we’ll confirm the exact delivery cost before dispatch.
Estimated delivery time
Delivery usually takes 5–7 business days once the bike has been collected by Mainfreight.
What to expect
- Bikes are securely packaged for transport
- Signature required on delivery
- Rural addresses may take slightly longer
