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  • Honda CB Ignition Spark Units ~ Replaces 30400-MA4-601
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Honda CB1100 CB1000 CB900 CB750 ignition spark units 30400-MA4-601
Honda CB Ignition Spark Units ~ Replaces 30400-MA4-601, SKU 14-0504: product photo and reviewed parts fiche. Example diagram; check listing for fitment.
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Honda CB Ignition Spark Units ~ Replaces 30400-MA4-601

14-0504
$219.00 USD
Currently out of stock
Check model fitment View fitment
Questions about this part? Contact us 4.8/5 1,347 store reviews
Secure checkoutProtected payment
60-day returnsEligible unused parts Free ground shippingUSA & Canada over $50
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Honda CB Ignition Spark Units ~ Replaces 30400-MA4-601
$219.00 USD
Description

Replace your DOHC CB's factory ignition spark units with this Aftermarket Ignition Spark Unit, an affordable alternative to the Honda OKI or NEC units. Replaces OEM #30400-MA4-601. Fits the 1979-82 CB750 family, CB750SC Nighthawk, CB900 family, CB1000C, CB1100F, and CB650 family.

Two spark units are used per bike, order the quantity you need.

Key Features
• Aftermarket ignition spark unit
• Replaces Honda OKI / NEC units
• Replaces OEM #30400-MA4-601
• Two units per bike
• Honda part name: Module, Ignition Control (Cdi) (Oki)
• Interchangeable with Honda 30400-426-154

Fitment / Compatibility

• Honda CB750K (1979‑82)
• CB750F (1979‑82) Supersport
• CB750C (1980‑82) Custom
• CB750L (1979) Limited

• Honda CB750SC (1982‑83) Nighthawk

• Honda CB900F (1981‑82) Supersport
• CB900C (1980‑82) Custom
• CB1000C (1983) Custom
• CB1100F (1983) Supersport

• Honda CB650 (1979‑82)
• CB650C (1980‑81) Custom
• CB650SC (1982) Nighthawk

Part Number: 14-0504

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Check the listed model and year, then read any fitment notes in the description.

Make Model Year
Honda CB750K Standard 1979
Honda CB750F Supersport 1979
Honda CB750L Limited 1979
Honda CB750K 1980
Honda CB750F 1980
Honda CB750C Custom 1980
Honda CB750K 1981
Honda CB750F 1981
Honda CB750C 1981
Honda CB750K 1982
Honda CB750F 1982
Honda CB750C 1982
Honda CB750SC Nighthawk 1982
Honda CB750SC 1983
Honda CB900C Custom 1980
Honda CB900C 1981
Honda CB900F Supersport 1981
Honda CB900C 1982
Honda CB900F 1982
Honda CB1000C Custom 1983
Honda CB1100F Supersport 1983
Honda CB650 1979
Honda CB650 1980
Honda CB650 1981
Honda CB650 1982
Honda CB650SC Nighthawk 1982
Honda CB650C Custom 1980
Honda CB650C Custom 1981

Free ground shipping over $50

To the USA & Canada. In-stock orders usually ship from our own warehouse the same or next business day.

Estimated ground delivery after your order ships
DestinationDelivery time
USA4–7 business days
Canada2–6 business days

Ground shipping includes tracking, emailed when your order ships. Need it sooner? Express options are available at checkout.

See full shipping details

60-day returns on eligible parts

No restocking fees. Eligible parts must be unused, uninstalled, unaltered and complete. The 60-day window starts when your order is delivered.

Electrical parts are excluded from standard returns. Check return eligibility.

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Other shipping options

Canada Post Economy: Available at checkout for select small items. Allow 1–3 weeks for delivery. No tracking or insurance is included.

Outside the USA & Canada: Delivery times vary by destination and shipping method. Buyers are responsible for applicable duties, taxes and import fees. We cannot mark orders as gifts.

Frequently Asked Questions

How many Honda 30400-MA4-601 ignition spark units are included and required?

One replacement spark unit is included. Each compatible motorcycle uses two ignition spark units, so two are required to replace both original OKI or NEC units.

Can one failed spark unit affect only part of a four-cylinder engine?

Yes. Each unit controls one ignition channel and its paired cylinders, so a failed unit can cause loss of spark on one cylinder pair. Confirm coils, pulse generators, wiring and grounds before replacing it.

Should both ignition spark units use compatible replacements?

Use electrically compatible units and compare connectors and mounting with Honda OEM 30400-MA4-601. Diagnose both channels and follow the ignition-system instructions during installation.

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