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1984 Honda CB700SC Main Wiring Harness

The main loom for a 1984 CB700SC needs to match more than the model name on the tank. Compare the listed replacement references, plug arrangement and branch routing with the motorcycle. Changed controls or charging components may need separate compatibility checks.

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Honda CB700SC wire harness 32100-MJ1-670

1984-86 Honda CB700SC Wire Harness ~ Replaces 32100-MJ1-670

$139.95 USD
73-0927
Replace your main wire harness with this Main Wire Harness Loom, replacing OEM #32100-MJ1-670 / #32100-MJ1-780.Note: this fits the model years and type listed;...
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1984 Honda CB700SC · Main Wiring Harness Buying guide

Compare the whole loom before replacing wiring

The main loom is listed for the 1984 CB700SC and replaces references 32100-MJ1-670 and 32100-MJ1-780. One harness is supplied; switches, ignition components, lamps, regulator and separate sub-harnesses are excluded. Identify those existing components before planning the replacement.

Parts to consider

1984-86 Honda CB700SC Wire Harness ~ Replaces 32100-MJ1-670 CB700SC main wiring loomOne CB700SC main loom replacing 32100-MJ1-670 / 32100-MJ1-780; electrical units and sub-harnesses are separate.View part

A main loom does not replace every electrical part

The product FAQ excludes switches, ignition parts, regulator/rectifier, lamps and separate sub-harnesses. Keep those pieces on the inspection list. Honda’s diagram also shows separate turn-signal flashing and cancellation components, so a new main harness should not be treated as a complete electrical-system package.

Match the motorcycle before changing connections

Honda distinguishes the 1984 pulse-generator arrangement from later bikes; use the correct diagram when checking that branch. The listed CB700SC application does not establish fitment to the Canadian CB750SC or an earlier Nighthawk. Document old routing, grounds and modifications before removal, and compare each connection rather than cutting a mismatched connector to make it fit.

Buying questions

Does the replacement main harness include the switches and charging units?

No. The product specifies one main loom and excludes switches, ignition components, regulator/rectifier, lamps and separate sub-harnesses. Check which existing components remain usable and which connections have been modified.

Can I use this CB700SC loom on a Canadian CB750SC?

That application is not established by this listing. Its exact fitment is 1984–86 CB700SC with references 32100-MJ1-670 and 32100-MJ1-780. Verify a Canadian CB750SC against its own model, market and wiring references.

What matters most when the old harness has been spliced?

Record branch routing, connector housings, grounds and every added accessory before removal. Use the correct CB700SC wiring information to separate factory circuits from modifications, then compare the replacement without bypassing incompatible connectors.

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