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The D.I.D 420NZ is a non-O-ring motocross racing chain in the 420 pitch specification — the standard chain size for Cobra CX50 mini motocross bikes and a wide range of 50–80cc competition motocross machines. D.I.D (Daido) is Japan's leading chain manufacturer and the OEM supplier to the world's top motocross and road racing manufacturers.
The 420NZ uses a narrow Z (NZ) link design optimised for lightweight racing applications where chain mass reduction directly benefits acceleration response and power delivery to the rear wheel. Non-O-ring construction reduces friction losses compared to sealed O-ring chains — appropriate for motocross applications where the chain is regularly cleaned and lubricated as part of maintenance routines rather than relying on internal O-ring grease retention.
Supplied at 122 links — standard length for most 420-pitch mini motocross applications including Cobra CX50. Link removal may be required depending on sprocket tooth count combination and swingarm adjustment. D.I.D chains are trusted at the highest levels of motocross competition worldwide.
Key Specifications:
Available at Art of Racing — shipped from Europe.
| Bike make | Cobra Moto |
|---|
We ship worldwide every day via DHL. Delivery within the EU is typically 2–3 business days.
We ship to every country DHL serves. Orders shipped to EU destinations qualify for free DHL shipping once the cart subtotal reaches €150. Orders shipped outside the EU are charged live DHL rates, calculated automatically at checkout.
You have 30 days from delivery to return any item in original condition. Full policy →
D.I.D (Daido Industrial Developments) is a Japanese drive chain manufacturer established in 1933. D.I.D chains are OEM-supplied to virtually every major motorcycle manufacturer in the world and are the benchmark for motocross and enduro aftermarket drive chains.
The motocross chain range covers standard, o-ring, and x-ring configurations built with hardened pins, heavy-duty side plates, and precision-formed rollers. D.I.D ERV3 and DZ2 series chains are designed to absorb the high-torque, high-impact loads generated by 2-stroke and 4-stroke motocross engines across all terrain conditions. Every D.I.D chain is manufactured in Japan to tight dimensional tolerances.
| Make | Model | Years | Notes |
|---|---|---|---|
| Cobra | CX50 | 2018–2027 |
