Replace your CB125S CDI box with this Rick's Motorsport Electrics CDI Box, replacing OEM #30400-437-023 / #30400-446-000 / #30400-437-003 / #30400-437-013. Brand-new direct replacement designed to perform to OEM specifications. A reliable and affordable option for the discontinued OEM product. Just plug it in and get fired up.
Key Features
• Rick's Motorsport Electrics CDI box
• Replaces OEM #30400-437-023 / -446-000 / -437-003 / -437-013
• OEM-spec performance
• Direct plug-in
• Honda part name: Module, Ign Cont
Fitment / Compatibility
• Honda CB125S (1981‑82)
Part Number: 24-2028
Check the listed model and year, then read any fitment notes in the description.
| Make | Model | Year |
|---|---|---|
| Honda | CB125S | 1981 |
| Honda | CB125S | 1982 |
No listed models match your search.
Free ground shipping over $50
To the USA & Canada. In-stock orders usually ship from our own warehouse the same or next business day.
| Destination | Delivery time |
|---|---|
| USA | 4–7 business days |
| Canada | 2–6 business days |
Ground shipping includes tracking, emailed when your order ships. Need it sooner? Express options are available at checkout.
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.
Start your return below. Wait for our instructions before mailing a part back.
Start a returnOther 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
Which Honda CDI numbers does CB125S unit 24-2028 replace?
The Rick's Motorsport Electrics CDI cross-references Honda 30400-437-023, 30400-446-000, 30400-437-003 and 30400-437-013.
Is the 1981-1982 CB125S CDI a direct plug-in unit?
Yes. One OEM-style direct-replacement CDI box is included for one compatible CB125S.
What should be checked before replacing the CDI box?
Check the spark plug and cap, ignition coil, pulse-source and stator readings, grounds, connectors and kill-switch circuit before condemning the CDI.