VintageCB750 Supplying CB Riders Since 2010

About Us Why Us? Reviews Shipping Info Returns Contact Us
Wish Lists
0 My Cart

Your cart is currently empty.

Browse all parts
Total (USD): $0.00
View cart
Menu
Search
Wish
Cart 0
My motorcycle Choose your Honda CB model

Search parts

Searching all Honda CB parts

Example: brake pads or oil filter.

1981 Honda CB750K Electrical Parts & Wiring

The 1981 CB750K electrical selection includes a main loom listed for the 1980–82 K model, a fuse assembly and separate ignition and charging components. Use the installed part and its connections to identify the purchase, then add any separately listed sub-harnesses needed.

Close ×
Your saved bike Choose your Honda CB model

Shop By Category

Most orders ship same or next business day Fitment guarantee Listed for your exact model and year? We’ll make it right if it doesn’t fit as described. Mechanic-backed support Ask our team for help choosing the right Honda CB part.
Currently viewing Electrical

Honda motorcycle parts

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

Honda CB750 CB650 CB550 CB500 CB450 gb cafe headlight bracket set.

Honda CB GB Cafe Headlight Bracket Set.

$44.52 USD
09-0016
Go for the distinct GB Café aesthetic with this GB Café Headlight Bracket Set in polished aluminum. Sized for 35mm fork tubes with 11mm...
Dynatek 3 ohm ignition coil set 2 with plug wires Honda CB

Dynatek Performance 3 Ohm Ignition Coil Set/2 with Plug Wires

$389.00 USD
07-9974
Combine Dynatek's performance coils with matching plug wires in one package using this Dynatek Performance Dual-Output 3 Ohm Ignition Coil Set of 2 with...
Honda CB900 CB750 CB650 CB550 switch base cover

Honda CB900/CB750/CB650/CB550 Switch Base Cover

$4.95 USD
12-0065
Replace just the base cover on your Honda ignition switch with this Switch Base Cover. Designed for our #12-0051 ignition switch (sold separately) with...
New
Honda CB750 CB650 headlight stay headlight reflector bolt 90120-425-000

1979-83 Honda CB750 / CB650 Headlight Stay / Headlight Reflector Bolt ~ Replaces 90120-425-000

$8.95 USD
99-4975
Replacement headlight stay bolt for restoring your CB750's headlight assembly back to proper condition. This is the bolt that fastens through the headlight ears,...
Sale
Honda CB750C CB750K rear brake light switch spring 35357-ME1-670

1979-83 Honda CB750 Rear Brake Light Switch Spring ~ Replaces 35357-ME1-670

$8.19 $7.87 USD
You save $0.32
73-0850
Replace your rear brake stop switch spring with this Rear Brake Light Stop Switch Spring. This is the spring that attaches to the rear...
Honda CB1000 CB900 headlight adjusting screw and spring set 33103-346-670

Honda CB Headlight Adjusting Screw & Spring Set ~ Replaces 33103-346-670

$7.50 USD
29-7011
Replace your headlight adjuster with this Headlight Adjusting Screw & Spring Set. Each set includes one screw and one spring. Replaces OEM #33103-346-670 (screw)...
Honda CB1100 CB1000 CB900 CB750 replacement coil tower boots

Honda CB1100 / CB1000 / CB900 / CB750 Replacement Coil Tower Boots

$4.95 USD
17-6830
Replace the tower boots on your performance coils with this Coil Tower Boots 2-pack. Fits performance coils #17-6810, #07-9973, #07-9979, and #07-9980.Key Features• Coil...
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...
Sold out
Dynatek 3 ohm ignition coil set 2 Honda CB

Dynatek Performance 3 Ohm Ignition Coil Set/2

$289.00 USD
07-9980
Match your Dyna-style electronic ignition requirement with this Dynatek Performance Dual-Output 3 Ohm Ignition Coil Set of 2. Same Dynatek quality as the 5...
Sold out
Honda CB1100 CB1000 CB900 CB750 ignition spark units 30400-MA4-601

Honda CB Ignition Spark Units ~ Replaces 30400-MA4-601

$219.00 USD
14-0504
Replace your DOHC CB's factory ignition spark units with this Aftermarket Ignition Spark Unit, an affordable alternative to the Honda OKI or NEC units....
New
Honda CB1100 CB1000 CB900 CB750 rear brake light switch 35350-KA2-405

Honda CB Rear Brake Light Switch ~ Replaces 35350-KA2-405

$22.18 USD
33-0024
Ensure your brake light activates properly with this Rear Stop Light Switch, designed as a direct replacement for several original Honda rear brake switches....
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...
Sold out
Honda CB1100 CB1000 rick's electrics brand ignition coil 30500-422-003

Honda CB Rick's Electrics Brand ~ Ignition Coil ~ Replaces 30500-422-003

$119.95 USD
24-6011
Replace your DOHC CB ignition coil with this Rick's Electric Replacement Ignition Coil, replacing OEM #30500-422-003 / #30500-422-013. Comes with wires attached.Two coils used...
Honda CB750 CB650 CB550 CB500 CB450 gb cafe headlight bracket set 34mm

Honda CB GB Cafe Headlight Bracket Set ~ 34mm

$44.52 USD
09-0017
Polished aluminum headlight bracket set designed for a clean café-style front end. Built to mount securely to 34mm fork tubes, providing a stable and...
Honda CB1100 CB900 CB750 CB650 fuse box assembly 38200-MF9-405

Honda CB1100 / CB900 / CB750 / CB650 Fuse Box Assembly ~ Replaces 38200-MF9-405

$49.95 USD
73-0125
Replace your fuse box with this Fuse Box Assembly Complete with 15-amp fuses, replacing OEM #38200-MF9-405.Key Features• Fuse box assembly• Includes 15-amp fuses• Replaces...
Sold out
Honda CB750 CB650 CB550 tommaselli type headlight bracket set 35mm

Honda CB Tommaselli Type Headlight Bracket Set ~ 35mm

$39.95 USD
09-0012
Go for a classic European look with these Tommaselli-Type Headlight Brackets, sized for 35mm fork tubes and supplied with rubber mount inserts. A sharp...
New
Honda CB750 CB650 CB550 SL350K2 Honda headlight stay rubber cushion 61315-340-000

Honda CB750 / CB650 / CB550 / SL350K2 Genuine Honda 61315-340-000 Headlight Stay Rubber Cushion

$15.95 USD
99-5368
This genuine Honda headlight stay rubber cushion fits the upper headlight and fork ear mounting area on select classic Honda CB and SL models....
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...
Honda CB750 black horn with bracket joker machine

Honda CB750 Black Horn with Bracket ~ Joker Machine

$59.95 USD
73-1065
Add a billet horn with this Joker Machine Brand Small Custom Black Horn with CNC-machined bracket and 2 gold mounting screws. This horn relocates...
Honda CB750 DOHC CB900 CB1100 dynatek dyna 2000 ultimate kit

1979-83 Honda CB750 DOHC / CB900 Dynatek Dyna 2000 Ultimate Kit

$999.00 USD
07-9989
Go all-in on the DOHC CB750, CB900, or CB1100 with this Dyna 2000 Digital Performance CDI Ignition Ultimate Kit. Includes the Dyna 2000 ignition...
Honda CB750 DOHC CB900 dynatek dyna 2000 ignition system

1979-83 Honda CB750 DOHC / CB900 Dynatek Dyna 2000 Ignition System

$795.00 USD
07-9991
Get just the digital ignition module for your DOHC CB with this Dyna 2000 Digital Performance CDI Ignition. No coils, no wires, just the...
Honda CB1100 CB900 CB750 performance high output 3.3 ohm coil

Honda CB1100 / CB900 / CB750 Performance High Output 3.3 Ohm Coil

$119.95 USD
17-6810
Upgrade your CB750 or big-bore DOHC CB with this Performance Dual Output Ignition Coil, a 3.3 Ohm dual-tower type with hardware. Replaces stock factory...
Honda CB900 CB750 CB650 fuse box assembly *damaged tabs* 38200-MF9-405

Honda CB900 / CB750 / CB650 Fuse Box Assembly *Damaged Tabs* ~ 38200-MF9-405 ~ Replaces 38200-MF9-405

$23.95 USD
73-1146
⚠️ Discounted – Minor Mounting Damage ⚠️ This Complete Fuse Box Assembly comes pre-installed with 15A fuses. The electrical function is perfect, but due...
Honda CB750 CB900 CB1100 performance 5.2 ohm ignition coil

Honda CB Performance 5.2 Ohm Dual-Output Ignition Coil

$129.95 USD
07-9973
Step up your ignition with this Performance High Output 5.2 Ohm Dual-Output Ignition Coil. Primary resistance of 5.2 Ohm, secondary of 17K Ohm, designed...
Honda CB1100 CB900 CB750 coil high tension wire ends (pk 2)

Honda CB1100 / CB900 / CB750 Coil High Tension Wire Ends (Pk/2)

$3.50 USD
17-6831
Replace the high-tension wire ends that fit inside your coil towers with this 2-pack of Coil High-Tension Lead Ends. Same fitment as our tower...
Honda CB900 CB750 CB650 turn signal gasket 33406-431-781

Honda CB900 / CB750 / CB650 Turn Signal Gasket ~ Replaces 33406-431-781

$4.61 USD
11-2083
Service the gasket on your 1979-82 DOHC CB's turn signal with this Turn Signal Gasket, replacing OEM #33406-431-781. Pairs with our signal lens #11-2179...
Honda CB750 DOHC CB900 CB1100 dynatek dyna 2000 premium kit

1979-83 Honda CB750 DOHC / CB900 Dynatek Dyna 2000 Premium Kit

$899.00 USD
07-9990
Upgrade your DOHC CB with the digital Dyna 2000 ignition in a middle-tier kit configuration. This Dyna 2000 Digital Performance CDI Ignition Premium Kit...
compare

1981 Honda CB750K · Electrical Buying guide

Choose the assembly first, then check its separate connections

A main wiring loom, fuse box and starter relay are distinct purchases with specific contents. Several smaller connection harnesses also have separate listings, including one explicitly excluded from the main loom.

Parts to consider

1980-82 Honda CB750K Wire Harness ~ Replaces 32100-425-770 CB750K main loomMain harness listed for the 1981 CB750K, replacing Honda 32100-425-770. Its stated application is the 1980–82 K model.View part Honda CB1100 / CB900 / CB750 / CB650 Fuse Box Assembly ~ Replaces 38200-MF9-405 Fuse assembly with 15-amp fusesAssembly replacing Honda 38200-MF9-405. The listing includes 15-amp fuses and identifies the 1981 CB750K among its applications.View part Honda CB Starter Solenoid Relay ~ Replaces 35850-MB0-007 Starter relay with fuseStarter solenoid relay replacing Honda 35850-MB0-007, supplied with a fuse. The companion connection pigtail is a separate product.View part

Read the main loom’s exclusions before adding smaller harnesses

The ignition-coil sub-harness description expressly says it is not included with the main wire harnesses. It plugs into the main loom and connects to the coils. Identify whether that section needs replacement as well, rather than expecting a main-harness purchase to include every smaller connection on the motorcycle.

Keep starting, charging and ignition purchases distinct

The range supplies a starter relay, charging-system brush and regulator products, ignition coils and other assemblies. Their replacement references and contents describe different jobs. Compare the actual component and its connections, and use the appropriate category guide to build the order without treating an electrical part as a complete system overhaul.

Common questions

The starter spins but the engine does not turn. Is that a relay fault?

Honda separates this symptom from a starter that will not run. A spinning starter with a stationary engine points to inspection of the starter clutch and drive gears. Identify the mechanical fault before choosing a roller kit or replacing the relay.

Does intermittent electrical power justify replacing the whole loom?

Not by itself. Honda identifies loose battery, charging and starting connections, plus loose or shorted ignition and lighting wiring, as possible causes. Locate the affected connection or circuit before deciding between a small wiring repair and a main-harness replacement.

Does a flat battery prove the regulator has failed?

No. Honda’s charging-system fault list also includes wiring faults, the rectifier and generator. The manual allows charging components to be tested on the motorcycle. Check battery condition and have the system tested before choosing a regulator or other charging part.

Not sure which part you need?

Send your model and year, plus photos of your existing part and any changes to the original setup.

Ask a fitment question
Parts categories for 1981 Honda CB750K

Your cart

×