DID 520DZ-120 Gold 120 Link High Performance Non-O-Ring Chain

In this review of the DID 520DZ-120 chain the bottom line is simple: this is a budget-friendly, high-performance non-sealed racing chain built for riders who need strength and a premium finish without a premium price. The chain is clearly aimed at motocross and ATV riders up to 450cc who demand a durable drive link that resists kinking and looks the part. Our review highlights real-world durability, simple installation with the included clip style master connecting link, and the tradeoff that this is not an O-ring sealed design.

Key Features

• Race-focused construction: The 520DZ2 design prioritizes high-performance use on demanding MX tracks, providing reliable power transfer under aggressive riding.
• High tensile strength: Rated for ATVs and motorcycles up to 450cc with a 7870 pound tensile strength, it gives confidence that the chain will withstand heavy loads and hard landings.
• SDH technology: Built with DID's SDH engineering to cope with grueling conditions, which helps maintain chain integrity over rough terrain.
• Distinctive finish: Gold outer plates and black inner links offer a premium look that many customers noted as a standout cosmetic upgrade for their bike.
• Clip style master link included: The chain arrives ready for a straightforward connection using the supplied clip style master connecting link, keeping installation simple in the field or the garage.

Who It's For

The 520DZ-120 is best for motocross racers, weekend MX riders, and ATV owners running engines up to 450cc who want a strong, attractive chain that performs under harsh track conditions. It suits riders who prioritize tensile strength and a budget-friendly price over sealed, long-life O-ring lubrication systems.

Riders who need low-maintenance, sealed chains with factory O-rings for extended life or street-focused motorcycles with long highway mileage may want to look elsewhere; this is a non-sealed racing chain designed for performance and track durability rather than maximum lubrication retention.

Pros & Cons

Pros

• Strong 7870 lb tensile rating gives confidence under heavy loads and aggressive riding.
• Noticeable premium finish with gold outer plates and black inner links that many buyers said "looks great".
• Good value for performance, with several customers praising durability and resistance to kinking or rust.

Cons

• Non-sealed design means it lacks O-ring sealing; some buyers expected an O-ring chain and noted that difference.
• Clip style master link may be less convenient than modern rivet-style links for some applications.

Specifications

Model	520DZ-120
Series	DZ2 High Performance
Links	120 links
Tensile Strength	7870 pounds
Recommended Use	ATV/Motorcycle up to 450cc
Finish	Gold outer plates, black inner links
Master Link	Clip style connecting link included

Our Verdict

The DID 520DZ-120 is a practical choice for riders who need a tough, attractive racing chain that holds up on demanding MX tracks without a high price tag. Its high tensile rating, SDH-focused build, and solid finish make it a smart buy for dirt riders and ATV enthusiasts, though those wanting O-ring sealing for extended lubrication retention should consider a different model.

Frequently Asked Questions

Is this an O-ring chain?
No. The 520DZ-120 is a non-sealed racing chain; several customers have noted it is not an O-ring design.

Will this fit my 450cc dirt bike?
Yes. The chain is rated for ATVs and motorcycles up to 450cc and has a 7870 lb tensile strength suitable for those engines.

Does it come with a master link?
Yes. A clip style master connecting link is included for installation.