Honda-SOHC

SOHC.co.uk Forums => CB500/550 => Topic started by: Johny Boy on April 08, 2026, 11:52:32 AM

Title: Main wiring harness routing
Post by: Johny Boy on April 08, 2026, 11:52:32 AM

Hi all, my rebuild is just about done, just the electrics to connect up.

Could someone help me with a dumb question?
where should the main harness end be secured?
I.e. under the tank or behind the headlight?

The harness is long enough to go up to the headlight area, but the cables from the handle bars are also long enough to reach under the tank!

I'm thinking it would look neater under the tank, but would appreciate your views

Thanks John

Title: Re: Main wiring harness routing
Post by: mickwinf on April 08, 2026, 12:20:27 PM

Depends on exact model, f1 and r2 join in a box under tank and others in headlamp.

Title: Re: Main wiring harness routing
Post by: Oddjob on April 08, 2026, 02:30:12 PM

Far too many block connectors in that pic for an F1 or F2. The K3 uses them on the handlebars switches wires but they should go into the headlight, so why so long?

Good wiring/cable diagram in the back of the workshop manual and PDI instructions for the 550. Really helpful especially for the cable routing, which is critical on these bikes.

Title: Re: Main wiring harness routing
Post by: Johny Boy on April 08, 2026, 03:45:28 PM

Thanks for that, she is a K3 but the switch gear are after market replacements, maybe that's why they are so long!

But that does answer my question, I will have a look at the documents you suggest

Title: Re: Main wiring harness routing
Post by: Oddjob on April 08, 2026, 04:38:13 PM

Clearly a new loom. Does it have the correct blocks connectors fitted for the switchgear?

Title: Re: Main wiring harness routing
Post by: Johny Boy on April 08, 2026, 06:03:32 PM

Yes it is and does have all the right connectors on