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1983 Honda CB450SC Nighthawk Regulator and Starter References

Use battery requirements and component references to plan starter and charging purchases for your 1983 CB450SC Nighthawk. The charging units differ in wiring and lithium-battery restrictions. The starter’s installation seal and body seal have separate sizes, so choose them by the sealing location being serviced.

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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...
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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1983 Honda CB450SC Nighthawk · Starter & Charging System Buying guide

Identify the charging design and seal location independently

Six-wire 24-2088 is described by two connector blocks. Rick’s 24-2034 omits the black sensing lead and is restricted to suitable lithium-ion batteries. Starter service then uses a separate choice between the 24.4 x 3.1mm installation seal and the nominal 60 x 1.4mm body seal.

Parts to consider

1978-86 Honda CB450 / CB400 Rectifier / Regulator ~ Replaces 31600-KV8-681 Two-block, six-wire charging unitOne block has three yellow wires; another four-space block carries three wires. Listed Honda replacements include 31600-MC9-740 as well as 31600-KV8-681 and 31600-413-008.View part 1978-86 Honda CB450 / CB400 Rectifier / Regulator ~ Lithium Ion Battery Compatible Rick’s unit for suitable lithium batteriesThe 24-2034 design has a 14.0V ±0.2 set point and no black sensing lead. The listing excludes standard lead-acid use and asks for battery compatibility confirmation.View part Honda CB Starter Motor Seal 60 x 1.4 ~ Replaces 31206-286-158 Nominal 60 x 1.4mm starter body seal03-0784 cross-references 31206-286-158 and 31206-402-008 for the body or cover assembly. It is distinct from the small installation O-ring.View part

Related parts: 24.4 x 3.1mm installation seal · Diode for clutch and neutral interlock paths · Terminal cover referenced to 32411-230-000

Compare wiring even when charging references overlap

The lithium unit and six-wire replacement share some Honda cross-references, but their descriptions give different wiring details. The lithium design has no black sensing lead and requires a suitable lithium-ion battery. A shared reference is therefore only part of the decision; it does not remove the battery or connector checks.

Keep motor-body seals separate from the starter installation seal

The larger seal is described for the starter body or cover. The small 03-0780 item is supplied as one 24.4 x 3.1mm seal and lists 91312-MG7-003, 91309-300-000 and 91309-425-003. Match the work location to those references rather than selecting either ring from its photograph.

Charging & Starter References FAQs

Can shared Honda references make the two charging units the same choice?

The references overlap, but 24-2034 is lithium-only, uses a 14.0V ±0.2 set point and omits the black sensing lead. Compare your battery requirements and connectors. The six-wire listing does not establish lithium compatibility merely through shared replacement numbers.

What should I compare at the plugs before ordering six-wire 24-2088?

Check for three yellow wires in one connector block and three wires in a four-space block. Compare the wire colors, both housings and Honda reference against the fitted unit. The described six-wire layout is the useful identification detail.

Which references separate starter-body sealing from the small installation seal?

The nominal 60 x 1.4mm body seal lists 31206-286-158 and 31206-402-008. The 24.4 x 3.1mm installation seal lists 91312-MG7-003, 91309-300-000 and 91309-425-003. Identify the sealing location before selecting either replacement.

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