Honda motorcycle parts
Choose your model and year to see parts listed for your bike.
Choose your model and year to see parts listed for your bike.
1978 Honda CB550K · Electrical Buying guide
The selection spans wiring, lighting, ignition and charging service. Main harnesses, fuse boxes and handlebar controls have different jobs; a purchase in one section does not complete the others.
Main wiring harnessThe listing identifies a main harness for CB550K models from 1977–78, referencing 32100-404-670. Compare the present loom and its connections, especially on a rewired motorcycle.View part
Fuse box with coverA separate fuse-box assembly with its cover and five included fuses. Its stated CB550K application is 1977–78; it is not a complete main wiring harness.View part
Right handlebar switchBlack brake-side switch assembly with wiring routed outside the handlebar. The listing includes the 1977–78 CB550K application; compare the actual control and wiring arrangement.View part
Related parts: Ignition switch with keys · Left switch with internal wiring · Combined regulator and rectifier
A loom that looks tidy in a photograph still needs to match the installed connections. The main harness and sub-harness are separately listed, while the fuse box is another assembly. Record which sections remain on the motorcycle before deciding what to replace together.
Custom handlebars, replacement ignition equipment and a changed battery can affect your choices. The left switch requires internal bar wiring, while the right switch runs outside. The charging selection also includes a lithium-specific regulator, so identify the installed battery rather than choosing by case appearance.
The main harness and complete fuse-box assembly are separate products. The fuse-box listing specifies its cover and five fuses; that does not establish their inclusion with the main loom or sub-harness.
No. The left assembly is described for wiring inside the handlebar and has a locator pin. The right assembly routes its wiring outside; inspect your fitted bars before choosing either replacement.
Identify the battery first. One regulator listing is specifically for lithium-ion batteries and excludes lead-acid use. Compare the chosen unit’s mounting dimensions and connections with the motorcycle as it is equipped.
Send your model and year, plus photos of your existing part and any changes to the original setup.
Select your exact model and year to narrow your results.
Choose your model and year.