DID 420NZ-120 Motorcycle Chain 420 Pitch Gold Finish SDH Pins, 120 Links (Includes Connecting Link)

The DID 420NZ-120 is a gold-finished, non O-ring motorcycle chain built with solid bushings, quad-riveted pins and SDH-treated pins for extended wear and shock resistance.

This 420NZ-120 chain from DID combines a compact 420 pitch with a corrosion-resistant gold finish and advanced pin treatment to deliver long-lasting performance for small-displacement bikes. It’s engineered without O-rings for a slimmer profile and lower drag, while the high-hardness SDH pin surface maintains a tough exterior and a resilient core to resist breakage under impact. The chain includes a connecting (master) link and uses a new anti-kinking design to simplify installation and upkeep.

How does the SDH pin treatment improve durability?

SDH (Surface Diffusion Hardening) forms a hard chromium-carbide layer on the pin surface while keeping the interior metal tougher and more ductile. This dual-property structure resists surface wear and absorbs shock loads without becoming brittle, improving both lifespan and reliability in demanding conditions.

• Hard outer layer reduces abrasion and scuffing.
• Tough inner core resists impact and sudden loads.
• Enhanced anti-oxidation properties slow corrosion.
• Proven performance in dusty and muddy environments.

Will this chain fit my motorcycle and how strong is it?

The 420NZ-120 is sized to 420 pitch standards and is intended for engines up to 150cc. With solid bushings and quad-riveted pins, the chain has a rated tensile strength that supports everyday riding and spirited use on smaller bikes.

• Designed for maximum engine displacement: 150cc.
• Tensile strength: 4930 pounds.
• Includes a master (connecting) link for quick joining.
• Non O-ring profile keeps width minimal for clearance-sensitive setups.

How much longer will this chain last compared to a standard chain?

Compared with conventional chains, the DID 420NZ with SDH pins delivers a significantly extended service life due to its wear-resistant surface and robust construction. Field and laboratory comparisons indicate a projected wear life multiple greater than standard untreated chains under similar conditions.

• Projected wear life: about 4.1× longer than a standard chain.
• Reduced elongation rate helps maintain sprocket engagement longer.
• Gold finish adds corrosion resistance for longer usable life.
• Quad-riveted pins lower the chance of pin pull or failure.

What practical benefits will I notice during installation and use?

The chain’s anti-kinking design and included master link make installation and initial handling easier. During use, riders will notice consistent power transfer, reduced maintenance frequency, and reliable performance in adverse conditions where dirt and moisture are present.

• Anti-kinking design reduces twisting when routing the chain.
• Master link speeds up installation and replacement.
• Slim, non O-ring construction minimizes friction and clearance issues.
• SDH treatment decreases wear-related maintenance intervals.

Who is this for? The DID 420NZ-120 is best suited for riders of small-displacement motorcycles, minibikes, mopeds and lightweight off-road machines up to 150cc who want a compact, durable chain with superior wear resistance. It appeals to riders prioritizing longevity, low drag and reliable performance in dusty or wet conditions, and to technicians who value an easier fitment and reduced maintenance schedule.