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1977 Honda CB550K Electrical Parts

Electrical work on a 1977 Honda CB550K can involve the main loom, junction-panel harness, controls or charging components. Start with the part actually being replaced, then compare its connections and mounting with the motorcycle’s present wiring rather than assembling a basket by year alone.

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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...
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)...
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Honda CB550F CB550K CB500K alternator cover gasket 11691-323-306

1971-78 Honda CB550F / CB550K / CB500K Alternator Cover Gasket ~ Replaces 11691-323-306

$9.86 USD
18-6999
Replace your CB500K or CB550 alternator cover gasket with this Alternator Cover Gasket, replacing OEM #11691-323-306.Key Features• Alternator cover gasket• Replaces OEM #11691-323-306• Honda...
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...
Honda CB550F CB550K sub wire harness 32105-390-000

1975-78 Honda CB550F / CB550K Sub Wire Harness ~ Replaces 32105-390-000

$29.95 USD
73-0123
Replace your CB550 sub wire harness with this Sub Wire Harness (Junction Panel Harness), the sub harness on the bike that many electrical components...
Honda CB550F CB550K CB500K negative (-) battery cable 32601-323-000

1971-78 Honda CB550F / CB550K / CB500K Negative (-) Battery Cable ~ Replaces 32601-323-000

$21.95 USD
73-0106
Replace your CB500 or CB550 negative battery cable with this Negative (-) Battery Cable (ground cable), replacing OEM #32601-323-000.Key Features• Negative (-) battery cable...
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Honda CB750 CB550 CB500 CB450 stock type headlight assembly 33100-341-701

Honda CB750 / CB550 / CB500 / CB450 Stock Type Headlight Assembly ~ Replaces 33100-341-701

$199.95 USD
08-0461
Restore the classic look of your Honda with this Stock Style Headlight Assembly. Features 7" Halogen Headlight Unit, Headlight Rim & Retainer, Plastic Headlight...
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...
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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...
Honda CB550 CB500 CB400F CB350F ignition coil set with plug caps

Ignition Coil Set with Plug Caps ~ Aftermarket Honda CB550 CB500 CB400F CB350F

$159.95 USD
24-2084
This aftermarket ignition coil set is built for the listed vintage Honda CB four-cylinder models. It replaces tired, cracked, weak, or failing original-style ignition...
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 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 CB550K wire harness 32100-404-670

1977-78 Honda CB550K Wire Harness ~ Replaces 32100-404-670

$109.95 USD
73-0128
Replace your CB550K main harness with this Main Wire Harness Loom, replacing OEM #32100-404-670.Note: this fits the model years listed. Other years of CB550...
Universal motorcycle spark plug cap VB05F

Universal Motorcycle Spark Plug Cap ~ VB05F

$9.50 USD
23-3124
Universal Motorcycle Spark Plug Cap ~ VB05F is an aftermarket part for the Honda CB applications listed in this product information. Before ordering, confirm...
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Honda CB750 SOHC CB500 CB550 dynatek dyna 2000 ultimate kit

Honda CB750 SOHC / CB500 / CB550 Dynatek Dyna 2000 Ultimate Kit

$1,199.00 USD
07-9992
Take the top-tier Dyna 2000 upgrade path on your SOHC CB750 or CB500/CB550 with this Dyna 2000 Digital Performance CDI Ignition Ultimate Kit. Includes...
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Honda CB500K CB550 CB750 SOHC electronic ignition kit with trigger plate, wiring harness and aluminum rotor

Electronic Ignition Kit ~ Honda CB500K / CB550 / CB750 SOHC

$229.00 USD
08-0319
Replace mechanical points and condensers with this aftermarket electronic ignition for the listed Honda SOHC four-cylinder models. Keep the original mechanical spark advancer and...
Honda CB750 SOHC CB500 CB550 dynatek dyna 2000 ignition system

Honda CB750 SOHC / CB500 / CB550 Dynatek Dyna 2000 Ignition System

$749.00 USD
07-9994
Get just the ignition module for your SOHC CB750 or CB500/CB550 with this Dyna 2000 Digital Performance CDI Ignition. The base unit for riders...
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1977 Honda CB550K · Electrical Buying guide

Plan electrical repairs around the existing wiring

The choices span complete harnesses, a covered fuse box, switch assemblies and smaller electrical service parts. Some suit a stock-style layout; electronic ignition and charging choices have additional conditions to check.

Parts to consider

1977-78 Honda CB550K Wire Harness ~ Replaces 32100-404-670 CB550K main wiring loomMain harness listed for the 1977–78 CB550K, replacing reference 32100-404-670. Match its plugs and branches to the motorcycle; the junction-panel harness is a separate part.View part Honda CB750 / CB550 / CB500 / CB400 Fuse Box Assembly ~ Replaces 38200-377-305 Fuse box with cover and fusesComplete fuse box with cover and five included fuses, listed for the 1977–78 CB550K. Compare the mounting and connections with your existing box.View part 1977-78 Honda CB750K / CB550K Bar Switch Assembly ~ Left (Clutch) Side ~ Replaces 35200-404-671 Left clutch-side switch assemblyBlack left switch assembly with wiring that runs inside the handlebar and a locator pin. Compare the bar openings and wiring; product instructions are linked in the listing.View part

Related parts: Ignition switch with keys · Junction-panel sub harness · Combined rectifier/regulator

Separate the harness jobs

The main loom and junction-panel sub harness are separate products. The latter is described as connecting components such as the fuse box, starter switch and rectifier. Identify the damaged section and compare the connector arrangement before deciding whether you need either harness or both.

Account for altered controls

The left handlebar switch routes its wires inside the bar, while the right assembly uses outside wiring. A changed handlebar or previously modified loom deserves its own comparison. Charging parts also need a battery-type check; the lithium-only regulator is expressly unsuitable for standard lead-acid batteries.

Common buying questions

Does a new main loom include the panel sub harness?

They have separate listings and different replacement references. Choose the main loom for the main wiring job and compare the junction-panel harness separately; the main-loom listing does not state that the panel harness is included.

Are all charging regulators suitable for either battery type?

No. The lithium-ion regulator is described as lithium-only and excludes standard lead-acid batteries. Compare your battery’s specified charging requirements with the selected regulator, including its stated voltage set point, before ordering.

What should I check when replacing both handlebar switches?

Check each side individually. The listed left assembly uses internal handlebar wiring and a locator pin; the right assembly uses outside wiring. Read their linked product instructions and compare the installed bars and connections before purchasing the pair.

Not sure which part you need?

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

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