1980 750H bare bones for mattylight

I can probably draw one up today or tomorrow. I assume you also want a brake light?

I don't know if the kill switch can handle full current for the whole bike. If you eliminate the key switch and want to use just the kill switch, it would take a relay. My friend did this on his KZ400 and it was pretty cool. He put the main fuse under the seat, so if he really wanted no one to turn the bike on, he would pull the main fuse. Then the kill switch was also the main switch.

I can draw that up, or draw it with no relay and you can see if the kill switch will handle it.

yes a brake light as well. and the relay sounds awesome with the removable fuse thank you soo much

Donch wrote:

... i have a 1980 kz750-B2(twin)...

I don't think there was a KZ750 B2 twin in 1980. It would be a 1977 B2 or 1980 G1 twin or something else.

The B2 and G1 are significantly different electrically, so I'd need to know the exact model.

ok so i pulled the vins frame and motor are different didnt notice till now
motor: kz750BE
frame:kz750G

i hope that helps if you need any more info i ll be here

You will want to confirm that the charging system on the G motor is original, as well as the stock ignition, but I'll try to draw something up.

So is it a G frame with a B motor that was installed later by someone else?

Or is that all G frames came with the B motors?

For example, all KZ550C frames came with KZ550A motors.
Also, the KZ650C frames came with KZ650B motors.

If Kawasaki fitted a B motor into the G frame, we need to follow the G wiring diagram.

But if you think the B motor was installed as a replacement for a G motor by a previous owner, then we need to follow the B wiring if he also replaced the charging system. If not, then we probably still have to follow the G wiring.

I'm afraid I just don't know enough about the 750 twins to know which is more likely. However, can you describe the charging system? Is there a seperate regulator and rectifier?

On the alternator cover, are there three philips head screws in a triangle shape?

Unfortunately, I have to leave. I'll try to check in later.

hope this helps

relay or solenoid ?

Thanks for the photos. That does make it easier.

That regulator, looks to me like a combo regulator/rectifier, which is what should be on the G1. The starter relay looks a little strange to me, but I don't know the 750 twin very well. The starter relay should have the battery cable going to it. It should also have the heavy cable going to the starter.

I would post a seperate thread asking about the starter relay ID. Someone with more 750 twin knowledge will chime in.

Here's what I have so far. The relay is a standard auto relay you should be able to get at most parts stores.



EDIT 1/9/2019:
Mattylight Barebones Bare Bones Wiring Diagram
1980 Kawasaki Kz750G1 twin with relay for power for Donch
Kz750G Kz750 G1 Kz 750 G 750G1 750G

This is for Skidooman. 1982 KZ750 M1 twin.




EDIT 1/10/2019:
Mattylight Barebones Bare Bones
1982 Kawasaki Kz750M1 twin for Skidooman
Kz750M Kz750 M1 Kz 750 M 750M1 750M

Hi loudhvx,

You've really helped a lot of people in this thread. I was wondering if you have a little extra time for me? I've got a 78 KZ650 C2 and found the following wiring diagram:

diagrams.kz650.info/wiring/images/KZ650-B2,C2.jpg

That's helpful, but I'm planning on cutting out a lot and having only the following:
-No ignition, no indicators, no horn, no speedo, no tach, no hazards
-Yes to headlight (with hi/lo), taillight, and turn signals
-A hidden on/off switch
-A hidden starter switch

Would you mind creating a bare bones diagram for this? I would really appreciate it!