DID 420NZ-120 Motorcycle Chain 120 Links Gold — Solid-Bushing, SDH-Hardened Pins for 150cc

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

Designed for small-displacement motorcycles and scooters, the DID 420NZ-120 combines a corrosion-resistant gold finish with an advanced pin hardening process to withstand abrasive, dusty and muddy conditions. This solid-bushing, quad-riveted design provides high durability in a compact, lightweight package. A master (connecting) link is included for straightforward installation and removal.

What makes the SDH pin treatment important for chain longevity?

DID's SDH (surface diffusion hardening) process hardens the outer layer of the pin while keeping a tougher, more ductile core. That combination yields excellent impact resistance and improved shock absorption without making the pin brittle.

• Chromium-carbide-like hard surface resists wear and scuffing.
• Softer inner core maintains shock resilience under load.
• Enhanced anti-oxidation properties slow corrosion in harsh environments.
• Performs reliably in dusty, muddy or wet riding situations.

How does this chain perform for small-engine motorcycles and scooters?

The 420NZ series targets engines up to about 150cc, offering a balance between strength and low weight suited to commuter and light sport applications. The chain's tensile capacity and projected wear life make it a strong choice for frequent riders who need dependable power transmission without excess bulk.

• Maximum recommended engine displacement: 150cc.
• Tensile strength: 4,930 pounds for robust load handling.
• Solid bushing design reduces lateral flex and improves alignment.
• Gold finish helps resist surface corrosion and eases inspection.

How does the 420NZ differ from O-ring chains and why choose non O-ring?

Unlike O-ring chains that use rubber seals to retain lubrication between plates, the 420NZ is a non O-ring, solid-bushing chain engineered for environments where seals can trap abrasive particles or be damaged. Without O-rings, the chain rides slightly lighter and can be a simpler option for applications where frequent cleaning and relubrication are practical.

• No O-rings to catch grit or fail under heavy contamination.
• Simpler maintenance: periodic cleaning and lube keep performance optimal.
• Reduced rotational mass benefits nimble, low-displacement bikes.
• Quad-riveted pins provide secure fastenings and durability.

Who is this chain best suited for? The DID 420NZ-120 is aimed at riders of small motorcycles, mopeds and scooters up to roughly 150cc who want a compact, durable drive chain that tolerates harsh trail-side conditions. It's a practical choice for commuters, weekend riders, and anyone who values long wear life and straightforward maintenance over the sealed convenience of O-ring designs. Mechanics and hobbyists will appreciate the included master link for easier fitting and occasional removal.