Topic: 1976 CB750F Kill Switch. Which One?

[BrianK]

Hi.

Buying an OEM kill switch for my USA 1976 CB750F, but I don’t want to take the existing one off the bike just yet.  My hard copy Honda parts list (Ver. 1) identifies the part as #35130-377-013.   CMSNL doesn’t show that part.  It shows #35130-377-670, which presumably is a later part.

The 013 version has 7 (or so) leads.  The 670 version has only 5 leads.

Can anyone shed some light on the difference, or whether they are somehow interchangeable?   Is one version preferable to the other if interchangeable?

I do believe always on headlights is a factor, and my bike is an always on version.

[Nurse Julie]

When you say 750F, do you mean 750 Four K6 or 750 F1 or 2? It's a superseded part number and having a 377 middle part number, it's for a 400/4 but also fits the 500/550 and 750 fours. Although it fits, it's not the same as the original part so there will be more or less wires.

[BrianK]

750F as in Super Sport.  Not a K series 750.  I believe 1975 was F0 and my 1976 is F1.  It’s a low serial number for that year so I think Version 1 of the parts book is correct.

750F specific parts usually have 392 middle numbers (although they sometimes fit other bikes) so I agree that these kill switches fit multiple bikes.

There is no indication in CMSNL that one of the two superseded the other.  In fact, there is no listing for the 013 version on CMSNL at all.

Ultimately I don’t understand why one version has more leads than the other.  Your theory makes the most sense though.   But does it makes sense to buy one over the other if both options are available?

[Old Scrambler]

Get a 7-wire unit.................part numbers can be misleading

[PeWe]

The switches differ due to the functionality various countries got. Often the headlight switch. If Parking light is used.

This one looks like the switch my K6 had from the beginning. Headlight Off-Parking- Headlight ON.
Hi-Lo switch on left hand switch that also had Hi flash when pressing horn button sideways to the right.

https://www.ebay.com/itm/276412102766?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=zlcyAcvcQMm&sssrc=4429486&ssuid=XgCEg0CPSya&var=&widget_ver=artemis&media=COPY

[Little_Phil]

The p/n 35130-377-013 shows a switch with the kill switch, starter button + OFF, P and H positions for the lights. That's why it has 7 wires.
https://www.cmsnl.com/products/swassy-statkill_35150377013/

If you have a USA bike with lights always on then this is the wrong switch. What controls are on your existing switch? (should be just kill and starter button)

[69cb750]

35130-377-P00
https://www.ebay.com/itm/231921918420

[jlh3rd]

and/or:

[BrianK]

Of course.  That makes total sense.  I recognized that it had something to do with always on, but didn’t put 2+2 together.  Putting my dunce cap on now.

Thanks everyone.  I’m not sure how I would get by without you.

[PeWe]

Parking light is a useful option.
I have used it when battery got tired after  too much riding in low speeds, low rpm (3000-3500 rpm)
LED parking light is visible daytime.
Reflector with parking lamp is common. 7" std reflector. Important to order for your roads. Right or left hand driving.

[Don R]

 The last F1 that I had needed a right control, (they all seem to) but I like to do things my way, so I wired in a K4 headlight switch. I've also installed the European right control with a parking lamp in the headlight like PeWe said.
  I've swapped the cb400F to the non-US switch and LED park  light and my K1 custom runs an amber LED in the headlight when the key is on. 
 Just match up the wire colors, there may be one or two unused ones because the new replacement switch is listed for multiple applications.
 

[pjlogue]

The 7 wire one is for 1976.  It has the engine starter contacts inside the switch are at +12V going  to the starter solenoid. Models with fewer wires use ground to activate the starter solenoid. 

The 7 wire one will cut out the headlight when the starter is engaged.  If you go with the fewer wire type you will need to rework the starter solenoid and the safety interlock for neutral/clutch.

-P.

[Oddjob]

Can I just say that the UK gets the 7 wire version on it's bikes, 400,550,750 for example. I've dismantled and restored quite a few of these and I can say there is no function to switch off the headlight if it's on when the starter button is pressed. That's the switch ending in 670 BTW. As the USA gets the always on lights I'd imagine turning them off whilst the starter works makes perfect sense and later 7 wire versions may do this but not the 670 version, just in case someone thought it was the answer to their problem.

[jlh3rd]

if this helps:
these are first edition, honda parts books for the 550F. The top page is for the U.S. '75 (FO) model, the bottom is for the U.K. F1 ('76 ?) model.
#4 :  U.S. 35130-377-670
         U.K. 35150-377-013

[newday777]

if this helps:
these are first edition, honda parts books for the 550F. The top page is for the U.S. '75 (FO) model, the bottom is for the U.K. F1 ('76 ?) model.
#4 :  U.S. 35130-377-670
         U.K. 35150-377-013

You say for the 550F??? Is that a typo?

[Little_Phil]

I'm only familiar with the 550s but on US bikes with just the kill and the start button (and including the HL off during start) they manage with 5 wires on some and the later K3s combine the two blacks and manage with a 4 way socket.

76 550

[jlh3rd]

if this helps:
these are first edition, honda parts books for the 550F. The top page is for the U.S. '75 (FO) model, the bottom is for the U.K. F1 ('76 ?) model.
#4 :  U.S. 35130-377-670
         U.K. 35150-377-013

You say for the 550F??? Is that a typo?

550F

[Oddjob]

You are correct, 013 for uk, 670 for usa. Far too many numbers floating anout this thread is my excuse, plus senility is starting to set in I think

[Don R]

 What is interesting is that even with the different country's components, the wiring harness is compatible with then all. I've found a double male end jumper when used on the US bikes, brown to brown/white if I recall. Remove it and match colors and everything non-US works.
 Some components don't know whether they are on a 400, 550 or 750. Recently I got 400F rear turn signal mount hardware and rubber parts for a 750 K0. It worked perfectly.