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1983 Honda CB450SC Nighthawk Electrical Repair Planning

For a 1983 CB450SC Nighthawk, write down the electrical component and its connections before buying a replacement. A six-wire charging unit, a starter-safety diode and a plug cap each solve a different parts need. Compare their references and contents with the equipment on your motorcycle.

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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 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 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...
Honda CB900 CB750 CB650 CB550 tail light cover screws 93500-04055-4J

Honda CB Tail Light Cover Screws ~ Replaces 93500-04055-4J

$4.69 USD
49-0145
Replace your tail light lens screws with this Tail Light Lens Screws Pack of 10, replacing OEM #93500-04055-4J.Key Features• Tail light lens screws• 10...
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...
New
Honda CB750 CB650 CB550 CB500 battery box rubber 83618-323-000

Honda CB Battery Box Rubber ~ Replaces 83618-323-000

$4.95 USD
99-4986
Upgrade or restore your vintage Honda motorcycle with this Battery Box Rubber — designed to replace OEM #83618‑323‑000 and cushion your battery from vibration...
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...
Honda CB750 CB550 CB450 CB400 rear turn signal rubbers pk 2 33606-371-000

Honda CB750 / CB550 / CB450 / CB400 Rear Turn Signal Rubbers Pk/2 ~ Replaces 33606-371-000

$15.95 USD
73-0834
Replace your rear turn signal rubbers with this Rear Turn Signal Rubbers Pk/2, replacing OEM #33606-371-000. These are the rubbers that go under the...
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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1983 Honda CB450SC Nighthawk · Electrical Buying guide

Separate charging, starter-safety and plug-lead purchases

Use connector layout to identify the charging replacement, the Honda number to distinguish the starter diode, and XD05F type to choose the plug cap. Count individual service pieces from the actual repair rather than treating the electrical selection as one complete kit.

Parts to consider

1978-86 Honda CB450 / CB400 Rectifier / Regulator ~ Replaces 31600-KV8-681 Charging unit identified by six wires24-2088 uses three yellow wires in one block and three wires in a four-space block. Compare the connectors and listed Honda replacement references.View part Honda CB Starter Clutch Diode ~ Replaces 31700-124-003 Diode for the starter interlockOne diode assembly is supplied for the compatible starter-safety circuit. References are 31700-124-003 and 31700-166-008; this is not the main charging rectifier.View part Honda CB Spark Plug Cap ~ XD05F XD05F cap for an individual leadOne resistor-style cap is included. The high-tension wire is separate, and the listing’s two-cap requirement is specific to compatible CB750 applications.View part

Related parts: Clutch-perch starter safety switch · Rubber cover for the starter terminal · Two-piece rear signal rubber pack

Keep each component’s supporting pieces on the repair list

The XD05F cap leaves the existing plug wire to be assessed separately. The starter terminal boot similarly excludes the cable and nut. Compare those retained parts before ordering: a cracked cover or cap can be only one piece of the work when the adjoining cable or lead is also damaged.

Read the clutch-switch function before choosing by name

Reference 35330-413-003 is described as the clutch-lever starter safety switch, although the product title contains brake-light wording. Use that detailed function and the fitted control position to guide the purchase. The rear stop-light switch and charging regulator have different functions and are separate buying decisions.

Electrical Service Choices FAQs

What identifies the diode needed for the starter-safety circuit?

The listed diode cross-references 31700-124-003 and 31700-166-008. It isolates the clutch and neutral paths in the starter interlock, with one assembly supplied. Match that reference and circuit function rather than selecting the main charging rectifier.

Which parts should I assess alongside a worn XD05F plug cap?

Check the existing high-tension wire and its cap connection for cracks, hardening or corrosion. One XD05F cap is included, while replacement wire is not. An order for the cap alone assumes the retained lead is still suitable.

How can I distinguish the starter-terminal cover from its adjoining parts?

The 32411-230-000 replacement is one rubber boot covering the high-current starter terminal. The cable, terminal nut and starter motor are separate. Inspect the terminal and cable eye before ordering when heat or corrosion is also present.

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