SOHC.co.uk Forums > CB750

K6 UK/US wiring harness differences?

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Bryanj:
The difference in the looms, UK to US is the extra wires on the US one to service the "running lights" in the indicators (Blue/White & Orange/White) which you leave disconnected as they aint legal in UK. The US switches put the rear light on in "Park" but there is no front one. You need to connect the headlamp sidelight/park as that is a legal requirement in UK even if the headlamp comes on as well at the same time

BigAl (Alan):
The UK switch gear can be utilised, obviously the USA head light has a sealed beam unit (no park/city light as image) Double check the spec of the looms for sale at £80.00. Most will be for USA models K3,4,5. Its not suitable for the K6 USA/UK model...starter safety devices are different, one is 2 wire the other has 5 wires.

I hope the above helps

Alan

Underdog1:

--- Quote from: BigAl on February 07, 2017, 09:49:52 AM ---The UK switch gear can be utilised, obviously the USA head light has a sealed beam unit (no park/city light as image) Double check the spec of the looms for sale at £80.00. Most will be for USA models K3,4,5. Its not suitable for the K6 USA/UK model...starter safety devices are different, one is 2 wire the other has 5 wires.

I hope the above helps

Alan

--- End quote ---

Yeah it is advertised as a 73-75 harness but in the description it says it can work with a K6 if you have the switchgear which allows you to select high/low on the left and on/off on the right. There's no wiring diagram on there. I've emailed the asking about the starter safety so will see what they come up with.

Here's the harness:

https://z1parts.net/honda-cb750k-1973-75-wiring-harness/

If it won't fit the k6 starter safety then I'm wondering if it would be just easier and cheaper to bypass it?

BigAl (Alan):
The harness can be modified to suit the replacement switch gear. The other issue is the starter switch on the K3-K5 has 2 wires as the K6 has 3 wires, if your OK with electrics it should not be a problem

Underdog1:

--- Quote from: BigAl on February 08, 2017, 09:22:07 AM ---The harness can be modified to suit the replacement switch gear. The other issue is the starter switch on the K3-K5 has 2 wires as the K6 has 3 wires, if your OK with electrics it should not be a problem

--- End quote ---

Just heard back from the company, they said as long as I have the replacement switch gear the harness will fit without modifications, including the starter switch. Guess I'll find out soon enough

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