RK Racing Chain 520-Series Motorcycle Chain M520HD-120 — 120-Link Heavy-Duty Pre-Stressed, Clip Master Link

This RK Racing Chain M520HD-120 (520 Series) is engineered for riders who need a durable, maintenance-friendly chain for street and light off-road use up to about 400cc. Manufactured in Malaysia using Japanese steel and built to Japanese specifications, the RKM series combines two-point riveted pins and curled bushings to deliver predictable wear characteristics and solid tensile strength. The chain is pre-stressed and pre-stretched at the factory, which reduces initial stretch and minimizes early adjustment needs after installation.

How strong is this chain and what loads can it handle?

The M520HD-120 is rated with a maximum tensile strength of 7,700 pounds/feet, giving it a robust safety margin for many street and small-displacement off-road applications. Its construction balances strength and weight so you get reliable power transfer without excessive mass.

• Maximum tensile: 7,700 pounds/feet
• Designed for motorcycles up to roughly 400cc (street/off-road)
• Weight: 3.65 pounds per 100 links
• Pin-to-pin center: 15.875 mm (standard 520 pitch)

What features reduce maintenance and initial adjustments?

This chain arrives pre-stressed and pre-stretched, so it experiences less immediate elongation after fitting compared with non-prepared chains. The two-point riveted pins and curled bushings provide stable articulation and consistent wear patterns, which helps keep adjustment intervals predictable.

• Pre-stressed/pre-stretched at the factory to lower early stretch
• Two-point riveted pins for secure plate attachment
• Curl-type bushings to promote uniform wear
• Clip-type master link for straightforward connection and servicing

How do I know the chain will fit my bike and what are the key dimensions?

The M520HD-120 uses the 520 pitch (15.875 mm pin-to-pin center), making it compatible with sprockets and derailleurs designed for 520 chains. Measure your bike’s required link count and sprocket compatibility before ordering; this listing provides 120 links which can be shortened to fit many bikes.

• Pitch: 520 series (15.875 mm pin-to-pin)
• Links included: 120 links (cut to fit as needed)
• Links per foot: 19.2
• Master link type: clip (included)

Who is this chain for? Riders who want an affordable, heavy-duty 520-series chain built to Japanese specifications will find the RK M520HD-120 a practical choice. It suits daily commuters, weekend sports riders, and light off-road enthusiasts running up to around 400cc who value reduced initial stretch, dependable tensile strength, and straightforward installation. If you need a chain with a clip master link, pre-stressed construction, and the reliability of Japanese steel manufactured in Malaysia, this RK Racing Chain option is worth considering.