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1978 Honda CB400A Ignition Parts

A replacement coil and a key switch address different points in the CB400A ignition circuit. Two coil choices share the same reference, while the switch requires a particular rectangular plug. Match those details before treating a no-start condition as a parts list.

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Most orders ship same or next business day Fitment guarantee Listed for your exact model and year? We’ll make it right if it doesn’t fit as described. Mechanic-backed support Ask our team for help choosing the right Honda CB part.
Currently viewing Ignition Systems, Ignition Switch, Coils, Plugs, Contact Points

Honda motorcycle parts

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Honda CB1100 CB1000 CB900 CB750 CB650 spark plug cap XD05F

Honda CB Spark Plug Cap ~ XD05F

$10.49 USD
23-3119
Replace your spark plug caps with this Spark Plug Cap, XD05F type. Two required per CB750. Key Features• Spark plug cap, XD05F• 2 required...
New
Honda CB450 CB400 ignition coil 30530-413-003

1978-82 Honda CB450 / CB400 Ignition Coil ~ Replaces 30530-413-003

$44.95 USD
17-4542
Replace your CB400 or CB450T ignition coil with this Ignition Coil, replacing OEM #30530-413-003.Sold each, order the quantity you need.Key Features• Ignition coil• Replaces...
New
Sold out
Honda CB450 CB400 ignition coil 30530-413-003

1978-82 Honda CB450 / CB400 Ignition Coil ~ Replaces 30530-413-003

$69.95 USD
24-2035
Replace your CB400 or CB450T ignition coil with this Rick's Electric Ignition Coil, replacing OEM #30530-413-003.Sold each, order the quantity you need.Key Features• Rick's...
Honda CB450 CB400 ignition switch 35100-MC0-671

1978-82 Honda CB450 / CB400 Ignition Switch ~ Replaces 35100-MC0-671

$24.95 USD
12-0053
Fit the rectangular connector block style ignition switch on your CB400 family bike with this Ignition Switch Assembly featuring a rectangular connector block with...
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1978 Honda CB400A · Ignition Buying guide

Choose the coil or switch your circuit needs

Both coil options reference 30530-413-003 and are sold individually. The key switch has six flat male terminals in a rectangular connector. These details matter more than the general CB400 family name.

Parts to consider

1978-82 Honda CB450 / CB400 Ignition Coil ~ Replaces 30530-413-003 Replacement ignition coilReplaces reference 30530-413-003 and is sold individually for the 1978 CB400A.View part 1978-82 Honda CB450 / CB400 Ignition Coil ~ Replaces 30530-413-003 Rick’s Electric ignition coilA Rick’s Electric option for reference 30530-413-003, sold individually.View part 1978-82 Honda CB450 / CB400 Ignition Switch ~ Replaces 35100-MC0-671 Six-terminal ignition switchUses a rectangular connector block with six flat male terminals.View part

Related parts: XD05F spark-plug cap

Compare the two coil choices

The standard replacement and Rick’s Electric coil both use the same documented Honda reference. Choose the desired supplier option after checking the installed assembly. Both are sold individually. Match the fitted coil, mounting and leads, and diagnose the ignition fault before ordering.

Inspect the key-switch connector

The switch is for a rectangular six-terminal connection. A swapped harness or previous electrical repair may leave a different plug on the motorcycle. Compare the actual terminal layout and use the Honda wiring diagram rather than adapting wires solely from their colours.

Ignition questions

How do the two featured coils differ?

One is the standard replacement offering and the other is identified as Rick’s Electric. Both reference 30530-413-003 and are sold individually. Select by the documented application and supplier choice, without assuming an unverified performance difference.

What must I check before buying the ignition switch?

Confirm a rectangular connector with six flat male terminals, then compare mounting and terminal arrangement. The listed CB400A application is conditional on that connector style; a changed wiring harness needs a separate check.

Is the linked plug cap a complete set for the motorcycle?

The linked product is an XD05F-type spark-plug cap. Confirm the supplied quantity before ordering multiple caps. Do not carry the page’s CB750 quantity wording over to the CB400A twin.

Not sure which part you need?

Send your model and year, plus photos of your existing part and any changes to the original setup.

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