EK 520 MX O-ring chain for Surron and E-Ride Pro — heavy-duty 520-pitch off-road chain

EK Chains

EK 520 MX Chain

$139.00

This part = 139 entries to win the ETM RTR
Ships fast from Idaho Falls
Double-check fitment before you send it — hit the fitment tab below.
Description

EK's 520 MX chain is a proven non-sealed roller chain built for riders who want minimal drag and maximum power transfer over ultimate longevity. It's a popular swap for Surron Ultra Bee and other 520-chain e-moto or MX builds where every bit of efficiency counts. Racers in particular favor a non-sealed chain like this one because it runs lighter and freer than an O-ring chain, even though it demands a bit more frequent lubrication to stay protected between motos.

Compatible With:

  • Surron Ultra Bee
  • Other 520-chain e-moto and MX builds (cut to length for your gearing)

Features:

  • 520 x 120 link count — cut to length for your setup
  • Non-sealed standard roller chain for minimal drag
  • Gold outer plates, black inner pivot links
  • Quad stake riveting for a secure, race-ready connection
  • Includes clip-style master link for easy installation
  • Favored by racers for lower rotating drag versus O-ring chains

Keep the correct link count on hand as a spare — chain failures are rare but they end a ride day fast when they happen. It's a proven choice among racers who value a light, fast-turning drivetrain. Whether you're lining up on the start gate or just putting in trail miles, having the correct chain spec on hand keeps you from being stuck improvising a fix. Ships fast from the USA, straight to your door.

See Also: Warp 9 Surron Drive Chain | Warp 9 Ultra Bee Disk Guard | Warp 9 Ultra Bee Jack Shaft Sprocket | Warp 9

Frequently Asked Questions

Will this fit my bike's stock link count?

It ships at 520 x 120 links — cut it down to match your specific gearing and swingarm length during install.

Is this an O-ring or non-sealed chain?

It's a non-sealed standard roller chain, chosen for lower drag and maximum power transfer rather than long-interval sealed lubrication.

What master link style does it use?

It includes a clip-style master link for straightforward installation and future chain maintenance.

Bike fitment

Check fitment before you send it.

EK 520 MX Chain $139.00