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1978 Honda CB750K Main Looms & Separate Wire Assemblies

The 1978 CB750K wiring selection pairs a year-specific main loom with separate alternator, horn and oil-pressure assemblies. Name the section being renewed before choosing a harness. Compare the fitted connector arrangement and listing references so a smaller lead is not mistaken for the main loom.

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Honda CB750 alternator stator wire harness 31110-300-154

1969-78 Honda CB750 Alternator Stator Wire Harness ~ Replaces 31110-300-154

$21.95 USD
24-4021
Replace your alternator stator wire harness with this Alternator Stator Wire Harness. Same 7-wire plug as the OEM part and hooks up without alterations....
Honda CB750 oil pressure switch wire assembly 31270-300-154

1969-78 Honda CB750 Oil Pressure Switch Wire Assembly ~ Replaces 31270-300-154

$31.95 USD
24-4020
Replace your oil pressure switch wire with this Oil Pressure Switch Wire Assembly, including the wire and rubber cover. Replaces OEM #31270-300-154 / #31270-300-005.Key...
Honda CB750K wire harness 32100-405-611

1978 Honda CB750K Wire Harness ~ Replaces 32100-405-611

$129.95 USD
24-4006
Replace your wire harness with this Main Wire Harness Loom, replacing OEM #32100-405-611.These fit only the model year and type listed. Other years and...
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Honda CB750 CB550 CB400 pilot turn signal light cover 37600-377-018

Honda CB750 / CB550 / CB400 Pilot Turn Signal Light Cover ~ Replaces 37600-377-018

$54.95 USD
99-4819
Restore your gauge cluster with this replacement Pilot Indicator Light Cover — a direct fit for OEM #37600‑377‑018. This part includes both the front...
Honda CB750K CB550F horn sub harness 38105-369-000

1977-78 Honda CB750K / CB550F Horn Sub Harness ~ Replaces 38105-369-000

$7.95 USD
73-0111
Replace your horn sub harness with this Horn Sub Harness, the harness that attaches to the horn. Replaces OEM #38105-369-000.Key Features• Horn sub harness•...
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1978 Honda CB750K · Wiring Harness Buying guide

Identify the wiring section before choosing a harness

The main loom is specific to the 1978 CB750K. The alternator harness describes a seven-wire plug, while the oil-pressure lead includes a rubber cover. Their contents and scope differ and should be compared separately.

Parts to consider

1978 Honda CB750K Wire Harness ~ Replaces 32100-405-611 1978-specific main wire harnessMain loom replacing Honda 32100-405-611. The description restricts the application to the stated model year and type.View part 1969-78 Honda CB750 Alternator Stator Wire Harness ~ Replaces 31110-300-154 Seven-wire alternator harnessAlternator harness replacing Honda 31110-300-154. Its description identifies a seven-wire plug matching the OEM arrangement.View part 1969-78 Honda CB750 Oil Pressure Switch Wire Assembly ~ Replaces 31270-300-154 Oil-pressure switch lead and coverSeparate wire assembly including its rubber cover, replacing Honda 31270-300-154 and 31270-300-005. It is a lead assembly rather than a switch.View part

Related parts: Separate horn connection harness

Treat the model-specific main loom as its own choice

The main-harness listing identifies Honda 32100-405-611 and cautions against assuming interchange between different CB750 years and types. Compare the actual loom before ordering, including any changed connectors. The category’s smaller harnesses do not establish which other pieces are included with the main loom purchase.

Identify a lead repair without buying the wrong assembly

The alternator product describes a seven-wire plug, the oil-pressure wire includes a rubber cover, and the horn sub-harness is described as attaching to the horn. Use those descriptions to locate the correct item. An indicator-panel cover also appears through category tagging, but that cover is not a wiring harness.

Common questions

Which replacement reference identifies this main loom?

The main-harness description lists Honda 32100-405-611 specifically for the 1978 CB750K. Compare that reference and the existing connector arrangement before purchasing; other CB750 years are not established by this particular listing.

Does the oil-pressure wire assembly include an oil-pressure switch?

It describes a wire and rubber cover and identifies its own replacement references. The switch is a separate component. Choose the lead when that is the wiring piece needing replacement, and check the switch independently.

Is an indicator-panel cover another wiring harness?

No. The cover listing describes front and rear cover pieces with screws rather than a loom. Category tagging can group supporting items together, so use the product description to identify a cover versus an actual wire assembly.

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