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1981 Honda CB750K Starter Relays & Alternator Service Parts

Starter and charging orders for the 1981 CB750K need different component checks. The featured relay supplies a fuse, the alternator brush set includes clip mounts, and the regulator/rectifier lists an eight-wire arrangement. Compare the installed connections before selecting these separate repair pieces.

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Currently viewing Starter & Charging System

Honda motorcycle parts

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Honda CB1100 CB1000 CB900 CB750 alternator cover gasket 11691-425-000

Honda CB1100 / CB1000 / CB900 / CB750 Alternator Cover Gasket ~ Replaces 11691-425-000

$12.64 USD
12-5008
Replace the alternator cover gasket on your DOHC CB with this Alternator Cover Gasket, replacing OEM #11691-425-000. Fits the 1979-82 CB750 family, CB750SC Nighthawk,...
Honda CB1100 CB1000 CB900 CB750 starter clutch rebuild kit

Honda CB1100 / CB1000 / CB900 / CB750 Starter Clutch Rebuild Kit

$47.95 USD
24-5001
Rebuild your starter clutch with this Starter Clutch Rebuild Kit, including 3 rollers (15 x 13), 3 caps (15.5 x 6.2), and 3 springs.Key...
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Honda CB1100 CB1000 CB900 CB750 starter solenoid relay 35850-MB0-007

Honda CB Starter Solenoid Relay ~ Replaces 35850-MB0-007

$34.95 USD
73-0824
Replace your starter solenoid relay with this Starter Solenoid Relay with fuse, replacing OEM #35850-MB0-007.If you would like the pigtails / plug that attaches...
New
Honda CB1100 CB1000 CB900 CB750 ATX14AHL battery

Honda CB1100/CB1000/CB900/CB750 ATX14AHL Battery

$79.95 USD
24-2204
Keep your vintage Honda starting strong with this ATX14AHL Replacement Battery, designed for reliable performance across a wide range of classic Honda models. This...
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 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 CB1100 CB1000 replacement alternator brush set 31124-MG5-000

Honda CB Replacement Alternator Brush Set ~ Replaces 31124-MG5-000

$34.95 USD
24-2001
Replace your DOHC CB's alternator brushes with this Replacement Alternator Brush Set of 2 with clip mounts. 18mm x 5mm x 4.5mm, for Honda...
Honda CB1100 CB1000 CB900 CB750 rectifier regulator

Honda CB1100 / CB1000 / CB900 / CB750 Rectifier/Regulator

$199.95 USD
24-2031
Replace your DOHC CB rectifier/regulator with this Rick's Electric OEM-Style 8-Wire Rectifier/Regulator. Two plugs: one 4-prong / 3-wire, and one 6-prong / 5-wire. Key...
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Honda CB1100 CB1000 CB900 CB750 CB700 starter solenoid switch assembly

Honda CB Starter Solenoid Switch Assembly

$44.95 USD
24-2004
Replace your DOHC CB's starter solenoid with this Starter Solenoid Switch Assembly, including a four-gang plug, 30-amp fuse with rubber holder, and cable attachment.The...
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Honda CB1100 CB1000 CB900 CB750 stator

Honda CB1100 / CB1000 / CB900 / CB750 Stator

$249.95 USD
24-2022
Replace your DOHC CB's stator with this Stator, more reliable than stock, no core required.Key Features• Stator• More reliable than stock• No core requiredFitment...
New
Honda CB1100 CB1000 CB900 CB750 rotor brush plate holder 31126-422-015

Honda CB Rotor Brush Plate Holder ~ Replaces 31126-422-015

$49.95 USD
24-2081
Replace your DOHC CB's rotor brush plate holder with this Rotor Brush Plate Holder for alternators, replacing OEM #31126-422-015 / #31126-422-005.Key Features• Rotor brush...
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 CB1100 CB900 CB750 starter motor cable 32402-425-000

Honda CB1100 / CB900 / CB750 Starter Motor Cable ~ Replaces 32402-425-000

$19.95 USD
73-0114
Replace your DOHC CB starter motor cable with this Starter Motor Cable, replacing OEM #32402-425-000.Key Features• Starter motor cable• Replaces OEM #32402-425-000• Honda part...
Honda CB1100 CB1000 CB900 CB750 CB700 starter relay pigtail plug

Honda CB Starter Relay Pigtail / Plug

$7.95 USD
11-2098
Connect your starter relay cleanly with this Starter Relay Pigtail / Plug. Designed to connect to our starter relays #24-2004 and #73-0824.Important: despite the...
Honda CB1100 CB1000 CB900 CB750 starter motor brush set 31201-292-158

Honda CB Starter Motor Brush Set ~ Replaces 31201-292-158

$29.95 USD
24-2021
Replace your Mitsuba 2-brush starter motor brushes with this Replacement Starter Brush Set of 2, 12mm x 14mm x 6mm, 1 piece with insulated...
Honda CB1100 CB1000 CB900 CB750 starter motor cover gasket 31282-425-300

Honda CB1100 / CB1000 / CB900 / CB750 Starter Motor Cover Gasket ~ Replaces Honda OEM 31282-425-300

$11.69 USD
18-7070
Starter Motor Cover Gasket ~ Replaces Honda OEM 31282-425-300 for the Honda CB models listed below. Use this part for repair, restoration, or replacement...
Honda CB1100 CB1000 CB900 CB750 rectifier regulator lithium ion battery compatible 31600-MA6-910

Honda CB1100 / CB1000 / CB900 / CB750 Rectifier/Regulator ~ Lithium Ion Battery Compatible

$199.95 USD
24-6006
Upgrade your DOHC CB to a lithium-ion compatible regulator with this Rick's Electric Rectifier/Regulator. Designed with a lower voltage set point for lithium-ion batteries...
Honda CB1100 CB1000 CB900 starter clutch roller spring 28125-516-030

Honda CB Starter Clutch Roller Spring ~ Replaces 28125-516-030

$3.50 USD
73-0856
Replace your starter clutch roller spring with this Starter Clutch Roller Spring, replacing OEM #28125-516-030.Sold each, order the quantity you require.Key Features• Starter clutch...
Honda CB1100 CB1000 CB900 CB750 starter motor 31200-438-505

Honda CB1100 / CB1000 / CB900 / CB750 Starter Motor ~ Replaces 31200-438-505

$329.00 USD
73-1079
Replace your starter motor with this Starter Motor Unit, replacing OEM #31200-438-505. This starter bolts on as a direct replacement for the OEM type...
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1981 Honda CB750K · Starter & Charging System Buying guide

Compare the charging connectors and the battery requirements

The featured regulator 24-2031 has eight wires across two plugs. The separate lithium-only unit 24-6006 has an explicit battery restriction and voltage set point. Check the actual battery and charging arrangement as well as the plugs before choosing a replacement.

Parts to consider

Honda CB Starter Solenoid Relay ~ Replaces 35850-MB0-007 Fused starter solenoid relayRelay replacing Honda 35850-MB0-007, listed with a fuse. Its description identifies the connection pigtail as a separate purchase.View part Honda CB Replacement Alternator Brush Set ~ Replaces 31124-MG5-000 Alternator brush pair with clip mountsSet of two brushes with clip mounts, listed at 18 × 5 × 4.5 mm. Honda 31124-MG5-000 is among its replacement references.View part Honda CB1100 / CB1000 / CB900 / CB750 Rectifier/Regulator Eight-wire Rick’s regulator/rectifierUnit with two plugs: one four-prong/three-wire and one six-prong/five-wire. Compare the actual connections with this listed arrangement.View part

Keep brush service separate from complete alternator replacement

Brush set 24-2001 lists two 18 x 5 x 4.5mm brushes with clip mounts, for Honda electromagnetic rotors. Its replacement references are 31124-MG5-000, 31124-422-005 and 31125-422-000. These are specifications of the replacement set, not wear limits or a diagnosis of the alternator.

Compare wire orientation as well as connector shape

The regulator description specifies eight wires divided between two plugs. The separate starter-relay pigtail description also warns buyers to confirm wire orientation despite the wire colours. Compare the actual wiring and selected product instructions; a familiar connector appearance does not establish that every wire is connected in the intended position.

Common questions

Do ten plug positions mean the featured regulator has ten wires?

The 24-2031 listing calls it an eight-wire unit: one four-prong plug carries three wires and one six-prong plug carries five. Compare both the connector arrangement and wire positions with the installed unit rather than counting plug positions alone.

Is any regulator that fits a CB750K suitable for a lithium battery?

The separate 24-6006 listing is specifically for lithium-ion batteries only, with a 14V ±0.2 set point, and excludes standard lead-acid batteries. It also requires confirmation against the battery’s requirements. The featured 24-2031 description does not establish that same lithium compatibility.

Can starter-relay plug wire colours alone identify the correct connection?

The companion pigtail listing explicitly warns buyers to confirm wire orientation despite the colours. Compare the wiring and relevant product instructions before connecting it; the relay and its separate plug have their own stated contents.

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