EK 520 H/Duty Motocross Black with Gold Inner Plate Chain 120L (10)

Meet the EK 520 H/Duty Motocross Chain in Black with Gold Inner Plates—a rugged, race-ready drivetrain upgrade that stands up to the brutal demands of MX and aggressive trail riding. The distinctive black outer plates paired with gold-toned inner plates aren’t just a look; they signal EK’s high-performance treatment designed to reduce friction and improve wear resistance under heavy loads, helping you ride smoother and longer between maintenance intervals.

Engineered for extreme motocross performance

The 520 chain size is the go-to choice for mid-displacement motocross bikes, and this heavy-duty variant is built to handle aggressive launches, hard braking, and rapid gear changes. Reinforced outer plates and tuned pin-bushing geometry deliver dependable strength, resisting distortion even on the most demanding tracks. With a 120-link length, this chain provides flexible setup options for a wide range of MX machines, while the HD designation points to a chain that can endure the heat and grit of high-intensity sessions.

Why the gold inner plates matter

Gold inner plates aren’t just cosmetic—they’re a hallmark of EK’s optimized surface treatment and material pairing. This design reduces friction across the moving parts, translating to cleaner shifts, cooler operation under race conditions, and enhanced longevity in muddy, dusty environments where grit can accelerate wear.

Ideal for who this is designed for

• Motocross racers and serious enthusiasts who demand consistent power transfer across laps and seasons.


• Riders tackling muddy, sandy, or wet tracks where chain wear accelerates and reliability matters.


• Bikes that use 520 chains and require a robust, 120-link length for a precise, secure fit.

What you get and how to install

This listing offers a 10-pack of EK 520 H/Duty Motocross Chains with Gold Inner Plates, each chain measuring 120 links. For installation, you’ll need a standard chain tool and the appropriate master link for your specific sprocket setup. Master link inclusion varies by package, so please verify your kit contents before installation.

Maintenance tips to maximize life

• Clean mud and grit promptly after rides; lubricate the chain to maintain smooth operation and reduce wear.


• Regularly check chain tension and elongation with a ruler or wear gauge; replace when measurements exceed factory specifications.


• Inspect for bent or damaged outer plates after hard landings or crashes, and replace if necessary to preserve safe power transfer.

With the EK 520 H/Duty Motocross Chain featuring Gold Inner Plates, you’re choosing a durable, race-proven drivetrain that translates brutal power into reliable acceleration and consistent performance across harsh track conditions. A smart, long-term upgrade for MX riders who refuse to compromise on durability, performance, and the distinctive EK look on the bike.