Stupid question about Frankenstein cafe build

[baldfish]

Hello.  I am a newbie to bikes in general and then I went and purchased a custom built 82' CB750c cafe bike that was created by a guy that builds drag bikes as my first bike.  So I think it is just left over pieces that he used to build it.  As such, it is not easy to work on.  On the other hand, this thing runs like a son-of-a-gun.  And it is beautiful in person, at least to me.  Anyway, I have a stupid question.  I have looked everywhere for this info.  I finally found manuals but they don't address this specifically that I can see.  And I know how to read an electrical schematic.  My brake light went out.  The running light works, just not the brake light.  And neither the front nor the rear works so I was assuming it wasn't either of those switches but rather a fuse - if this has one.  I have taken a lot of stuff off the bike in order to locate the fuse box but for the life of me, I can't find it.  Also he changed the forks to ones from a GSXR and the speedometer went out.  But I can't find another one for whatever year he used (I am not sure and he moved away).  I would love to find a used speedo.  Thanks for reading my long intro email.  And this is a terrible pic of the bike.  I'll get more later.

[Griffin]

Have you checked the headlight bucket for the fuses? I don't know much about Suzuki speedos. Maybe look for a brand on the broken one. Or Google electric Suzuki speedo for images the look similar.

[TOOLS1]

Someone else build=your nightmare. The builder might not have incorporated fuses  into the wiring. You are just going to have to start tracing down wires until you find the problem.
TOOLS

[baldfish]

I did check the headlight.  Thx.

[baldfish]

Interesting update.  The builder of the bike is back in town from the East Coast and I am taking him to lunch today to pick his brain about the bike.  If there are any specific questions you can think of that I should ask him, that would be great.  Also, there are a lot of beautiful bikes here.  Some of them more true to the original than my own.  I am happy with mine but I may get a different one in a few years.  I am extending the rear end this weekend about 4 inches.  That is my only complaint with the bike visually.

[Re-run]

Three common places a builder hides things; headlight bucket, under the tank, under the seat/hump. I sure hope he put fuses on there.