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1981 Honda CB400TB Hawk Electrical Parts

An electrical repair on the 1981 Hawk starts with identifying the circuit and the parts already fitted. This selection covers ignition switching, circuit protection and charging, with connector details and battery restrictions that matter more than an outward resemblance.

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Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

Honda CB750 CB550 CB500 CB450 CB400 rear brake light switch

Honda CB Rear Brake Light Switch

$10.33 USD
12-0008
Replace your rear brake light switch with this Rear Brake Light Stop Switch. Exceptionally broad fitment across the SOHC CB750 lineup and virtually the...
Honda CB900 CB750 CB650 CB550 CB500 oil pressure switch 37240-P13-013

Honda CB Oil Pressure Switch ~ Replaces 37240-P13-013

$23.95 USD
73-0825
Replace your oil pressure switch with this Oil Pressure Switch, replacing OEM #37240-P13-013.Key Features• Oil pressure switch• Replaces OEM #37240-P13-013• Honda part name: Switch...
Honda CB1100 CB1000 CB900 CB750 CB450 alternator rotor puller

Honda CB Alternator Rotor Puller

$12.95 USD
35-0035
Pull your DOHC CB alternator rotor with this Alternator Rotor Puller, 18mm x M1.5 right-hand thread, for internal-thread rotors and flywheels.Key Features• Alternator rotor...
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...
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...
New
Honda CB750 CB650 CB550 CB450 headlight setting collar 61304-292-000

Honda CB Headlight Setting Collar ~ Replaces 61304-292-000

$4.50 USD
07-4645
Restore headlight mounting with this Headlight Setting Collar, replacing OEM #61304-292-000. Exceptionally broad fitment across the classic Honda lineup, from the SOHC and DOHC...
Honda CB1100 CB1000 clutch lever brake light switch 35330-413-003

Honda CB Clutch Lever Brake Light Switch ~ Replaces 35330-413-003

$15.95 USD
29-7029
Replace your front clutch lever safety stop switch with this Clutch Lever Stop Switch, replacing OEM #35330-413-003. This is the switch that allows the...
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 CB750 CB500 CB450 CB400 turn signal lamp gasket 33443-268-671

Honda CB Turn Signal Lamp Gasket ~ Replaces 33443-268-671

$4.61 USD
11-2085
Service your early CB750 or classic twin turn signal with this Turn Signal Lamp Gasket, replacing OEM #33443-268-671. Pairs with our signal lens #11-2110...
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
Honda CB450 CB400 fuse box assembly 38200-413-003

1978-82 Honda CB450 / CB400 Fuse Box Assembly ~ Replaces 38200-413-003

$54.95 USD
11-2106
Rebuild your CB400 family fuse box with this Complete Fuse Box Assembly (fuses included), replacing OEM #38200-413-003. Fits the full CB400 range from 1978-82...
New
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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...
Honda CB450 CB400 CB360 tommaselli type headlight bracket set 32-34mm

Honda CB Tommaselli Type Headlight Bracket Set ~ 32-34mm

$39.95 USD
09-0015
Fit the Tommaselli look to your smaller-bore Honda with these 32-34mm Tommaselli-Type Headlight Brackets, supplied with rubber mount inserts. Sized for 33mm fork tubes...
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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1981 Honda CB400TB Hawk · Electrical Buying guide

Plan the repair around the circuit

The Hawk’s CDI ignition, fused wiring and charging system have different jobs. Identify the failed component before selecting a switch, fuse box or regulator, especially on a motorcycle with altered wiring.

Parts to consider

1978-82 Honda CB450 / CB400 Ignition Switch ~ Replaces 35100-MC0-671 Rectangular-block ignition switchSix flat male terminals in a rectangular connector block. Compare the fitted harness before ordering.View part 1978-82 Honda CB450 / CB400 Fuse Box Assembly ~ Replaces 38200-413-003 Fuse box with fusesComplete replacement fuse-box assembly with fuses included; reference 38200-413-003.View part 1978-86 Honda CB450 / CB400 Rectifier / Regulator ~ Replaces 31600-KV8-681 Six-wire rectifier/regulatorTwo connector blocks: three yellow wires in one block and three wires in a four-space block.View part

Related parts: Lithium-only regulator

Separate starting from charging

A key-switch fault, a damaged fuse holder and a charging problem require different checks. Record which lights or functions fail, then follow the 1981 Honda wiring diagram. The ignition switch uses a rectangular six-terminal block; compare the connector before disturbing the original harness.

Choose the regulator for the battery

The featured replacement has six wires across two connector blocks. The linked Rick’s lithium regulator is a separate choice with a 14 V ±0.2 set point and no black signal wire. Confirm compatibility with the battery manufacturer; it is not for standard lead-acid batteries.

Buying questions

Will the ignition switch fit an altered loom?

Only after the connector and circuit connections have been checked. This switch uses six flat male terminals in a rectangular block; a matching-looking key barrel alone does not establish compatibility.

Are fuses included with the replacement box?

Yes. The complete fuse-box assembly includes fuses. Before installation, check the circuit assignments and ratings against the 1981 Honda information rather than transferring assumptions from a previously modified box.

Does the lithium regulator suit any battery?

No. It is specifically a lithium-ion option, and the battery maker must approve its 14 V ±0.2 set point. Do not choose it for a standard lead-acid battery.

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