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1978 Honda CB400TII Hawk II Starter & Charging

The 1978 Hawk II has an electric starter as well as a kickstarter. A starter relay and a charging regulator solve different problems, while lithium and conventional charging arrangements require different choices. Match the failed component, its connections and the battery before ordering.

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Currently viewing Starter & Charging System

Honda motorcycle parts

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Honda CB1100 CB1000 starter motor terminal rubber boot 32411-230-000

Honda CB Starter Motor Terminal Rubber Boot ~ Replaces 32411-230-000

$4.61 USD
73-0092
Replace your starter motor terminal cover with this Starter Motor Terminal (Cover) Rubber Boot, replacing OEM #32411-230-000.Key Features• Starter motor terminal rubber boot• Replaces...
Honda CB1100 CB1000 CB900 CB750 starter clutch diode 31700-124-003

Honda CB Starter Clutch Diode ~ Replaces 31700-124-003

$12.88 USD
24-2044
Replace your starter clutch diode with this Stator Clutch Diode/Rectifier, replacing OEM #31700-124-003 / #31700-166-008. Exceptionally broad fitment across the SOHC and DOHC CB750...
Honda CB750 CB550 CB500 CB450 starter solenoid relay 35850-375-000

Honda CB Starter Solenoid Relay ~ Replaces 35850-375-000

$38.95 USD
24-2003
Replace your late-'70s CB starter solenoid with this Starter Solenoid Relay, replacing OEM #35850-375-000 / #35850-286-027. Broad fitment across the late SOHC CB750, CB500T/CB550...
New
Honda CB starter motor seal 60 x 1.4 31206-286-158

Honda CB Starter Motor Seal 60 x 1.4 ~ Replaces 31206-286-158

$5.95 USD
03-0784
Seal up your starter motor with this Starter Motor Seal, size 60 x 1.4, replacing OEM #31206-286-158 / #31206-402-008. Exceptionally broad fitment across the...
New
Honda CB starter motor seal 24.4 x 3.1 91312-MG7-003

Honda CB Starter Motor Seal 24.4 x 3.1 ~ Replaces 91312-MG7-003

$4.50 USD
03-0780
Seal up your starter motor with this Starter Motor Seal, size 24.4 x 3.1, replacing OEM #91312-MG7-003 / #91309-300-000 / #91309-425-003. Exceptionally wide fitment...
Honda CB450 CB400 rectifier regulator 31600-KV8-681

1978-86 Honda CB450 / CB400 Rectifier / Regulator ~ Replaces 31600-KV8-681

$179.95 USD
24-2088
Replace your CB400 or CB450 rectifier/regulator with this Rectifier/Regulator, 6 wires, 3 yellow in one connector block and 3 wires in a 4-space block....
New
Honda CB450 CB400 rectifier regulator lithium ion battery compatible 31600-KV8-681

1978-86 Honda CB450 / CB400 Rectifier / Regulator ~ Lithium Ion Battery Compatible

$189.95 USD
24-2034
Upgrade your CB400 or CB450 to a lithium-ion compatible regulator with this Rick's Electric Rectifier/Regulator, replacing OEM #31600-KV8-681 / #31600-413-008. Designed with a lower...
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1978 Honda CB400TII Hawk II · Starter & Charging Buying guide

Distinguish the starter circuit from battery charging

The starter solenoid controls the motor circuit. The rectifier/regulator serves charging, with standard-pattern and lithium-only options here. Use the correct Type II wiring diagram when checking original or modified connections.

Parts to consider

Honda CB Starter Solenoid Relay ~ Replaces 35850-375-000 Starter solenoid relayReplacement for the 35850-375-000 / 35850-286-027 references, with an explicit 1978 Hawk II application. Compare the mounting, cable terminals and control-wire connections with the fitted relay.View part 1978-86 Honda CB450 / CB400 Rectifier / Regulator ~ Replaces 31600-KV8-681 Six-wire rectifier/regulatorTwo connector blocks carry six wires: three yellow wires in one block and three wires in a four-position block. Match both plugs and the wire arrangement before ordering.View part 1978-86 Honda CB450 / CB400 Rectifier / Regulator ~ Lithium Ion Battery Compatible Lithium-only rectifier/regulatorRick's unit has a 14V ±0.2 set point and omits the black signal wire. Use only with a compatible lithium-ion battery; it is unsuitable for standard lead-acid batteries.View part

Related parts: Starter terminal protective boot · 60 × 1.4 starter-motor seal

Compare the relay as an assembly

The starter solenoid has an explicit 1978 CB400TII application and two listed replacement references. Inspect its mounting, heavy-cable terminals and small control-wire connections. A click or a no-crank symptom alone does not establish relay failure; check the battery and circuit using the service manual before ordering.

Make the regulator choice around the battery

The standard-pattern regulator has six wires across two connector blocks. Rick's lithium-only version has a 14V ±0.2 set point and intentionally omits the black signal wire. Confirm the lithium battery manufacturer's charging requirement before selecting that version; it must not be used with a standard lead-acid battery.

Common buying questions

Does this Hawk II have an electric starter?

Yes. The 1978 CB400TII has electric and kick starting. Use Type II starter-system information when selecting the relay or servicing its circuit, and check any changes made to the motorcycle.

Why does the lithium regulator have one fewer wire?

Rick's lithium-compatible design intentionally omits the black signal wire. That difference is part of its design, not permission to rearrange the loom. Follow its instructions and confirm the battery's required charging set point.

What should I compare on the standard-pattern regulator?

Check the two connector blocks and all six wire positions: three yellow wires in one block, with three wires in a four-position block. Also compare the mounting and confirm the unit suits the fitted charging system.

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