TOPIC:

The 400F is 100% stock aside from a muffler.

 

Ditto on this one. Unless that was a statement for yours?

Besutiful bikes. Classic exhaust. A buddy had one from new back in the 70s.and i rode it one evening. Compared to my cb500/4 it was light, zippy, responsive and just all around lovely to ride.

That 4 pin connector which F64 circled in red above was a weak point. It was easily accessable and could be and was hot wired with a paper clip after a thief busted the steering lock.  My buddy got the bike back though and had it repaired. 

 

I forgot to mention don't disconnect that ignition switch connector. You'll have to back probe it. You may need sewing needles, T-pins, paper clips to get to the conductor inside the connector. Unless, you have long thin probes.


 

Here is the data and some photos.

TIA

 

The 12.68 fuse reading is a bad fuse possibly.

You are getting 12.68 volts on one side but not the other side.
most likely bad

hold on.

the 12.68 v fuse reads 12.68 on both sides of that fuse?

I have find a different scematic as I only see one fuse on the one you included.. I'll look at it again.

<<Ditto on this one. Unless that was a statement for yours? >>

Mine is stock.

It's crazy to me that these bikes were RACED by fast guys at fast tracks. Kaz Yoshima built a bunch of them (Ontario Moto Tech) and those bikes were raced all over the place--Willow Springs, Riverside, etc.

It's a pressed tin frame on top! You know, like a cake pan.

I wish Kawasaki would have made a 400cc inline 4 bike here in the USA--something like the KZ650, in the 1970s. Kawasaki 650 is a much more serious motorcycle than the 400F.

<<The 12.68 fuse reading is a bad fuse possibly.

You are getting 12.68 volts on one side but not the other side.
most likely bad >>


That was it!

Everybody please join me in raising a glass of whiskey in thanks to F64.

Two fuses that look perfect which were in fact bad. Third fuse ... lights go on and all is well.

Guys I hope you don't think I am interfering, the below diagram shows the three fuses your bike uses (top and bottom are spares) and the pic shows the back of the fuse box. I suspect as these are soldered joints (which will rot after 50 years) the red wire may have come adrift in the back of the fuse box 
EDIT: you are sorted, good job F64


 

Nothing close to interfering. You actually jogged my brain a bit. I had an ole CB550 that i had running correctly, friend left with a smile only to call me a few blocks away. He had just purchased this Honda and it was his innagural ride. Turned-out the wires within the sheath that route under the bucket to frame had some fatigue issues and one of the "joints' of wire splicing had seperated.