Description
COMPATIBILITY:
GX640 type SD1 GX640 type SD1/A GX640 type SD2 GX640 type SD2/A GX640 type SD3 GX640 type SD4 GX640 type SD4/A H4518H type HSA/A H4518H type HSA/B H4518H type HSA/C H4518H type HSA/D H4518H type HSAC/A H4518H type HSAC/B H5518 type AC2/A H5518 type AC2/B H5518 type AC4/A H5518 type AC4/B H5518 type NAC2/A H5518 type NAC2/B H5518 type NAC4/A H5518 type NAC4/B H5518 type A2
What is CDI?
CDI stands for capacitor discharge ignition (alternatively, “capacitive.”) If you’re new to capacitors, they’re similar to batteries in that they can store energy for later. What sets them apart is their ability to release all that energy near instantaneously, which is ideal for an ignition circuit.
The basic CDI system is a trigger mechanism, coils, and a box, often black, with capacitors and other circuitry inside. The trigger tells the box to fire, the box determines when to fire which coil with the capacitors, and zap goes the spark plug, ad infinitum. In addition to dischargin’ those capacitors, the box may also influence your rev limit, timing advance, and other variables related to spark, but that’s it.
Vehicle information
Available fitment details
Listing compatibility notes
- [Working principle]: The generator coil produces high-voltage electricity, which flows through the electronic igniter, then through the high-voltage package, and ultimately reaches the spark plug to complete the ignition process [Compatible With]: for Honda 4518 & 5518.
Fitment data is provided as a buying aid. Verify the listing against your vehicle and existing part before ordering.
Exact identity, part numbers, model references, and available compatibility evidence
Buying guidance
Quick decision
An identity-first control units listing organized around stable product references and available compatibility evidence.
Fit and size notes
- Match the complete identifier, side, position, connector, dimensions, and visible design with the existing part.
- Treat uncertain vehicle notes as a buying aid, not as a confirmed fitment guarantee.
Specification notes
- Canonical product: MP-US-B0F4K9MNPD
- Source product ID: B0F4K9MNPD
- Category: Replacement Parts / Ignition Parts / Control Units
- Available images: 8
Before you buy
- Match the complete identifier, side, position, connector, dimensions, and visible design with the existing part.
- Treat uncertain vehicle notes as a buying aid, not as a confirmed fitment guarantee.
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