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To make a long story short, a shop screwed me and my bikes carburators and I need to know the right size jets I need for my 1980 cb750c. Can anyone help me out?

I just got my hands on a bare cb750 k1 frame and I'm rebuilding it as a Frankenstein bike. I have plans to put my brothers vulcan 1500 engine in it but I am unsure if it will fit. Does anybody have a diagram or know the measurements of the frame? Thanks in advance.

Yea I know the yellow wires goes to the unit for 2/3 and blue goes to the unit for 1/4. I added the wiring diagram I'm following. I just need to know if I wired the 2 yellow wires backwards going into the spark unit for 2/3 does it matter? Or does it act more just like a switch where polarity...

So far so good, just need to figure out where 4 wires go then its final wiring and install. Its mainly an ego/confidence thing. Just so I can say I did it

Do you know if the yellow and blue wires that go to the spark units have polarity? I'm currently rewiring my 80 cb750c. I have black, green, 2 yellow and 2 blue. I know the yellows go to one unit and blue goes to the other but I don't know if I can accidently wire them backwards

I got everything routed. Only thing I'm trying to figure out is if the polarity on the pulse generator to the spark units or if it even matters.

I'm rewiring my 1980 cb750c and I'm wondering if the pulse generator has polarity going to the spark units. The wire colors coming out of the pulse generator are black and green (which aren't used in the new harness. I believe they are for the neutral light.) then 2 yellow and 2 blue. The...

Did you read the part about them going into the bottom half of the engine? All my internals of my engine are good and I'm not trying to open it up.

I do have an working oil pressure gauge. Right now I'm just wiring what is needed to be road legal. Everything else will be slowly added over time when I can.

Yes. All lighting on my bike is now working. (Atleast what I wired in, no oil or neutral light, blacklighting for the gauges, etc.) Just have to fabricate some mounts for the switches, the new key and my temporary tail lights tomorrow. I was having a little issue with the starter/ignition...

Is it possible that it is the pulse generator? Cause 6 wires seems a bit high for just an oil and neutral sensor

Yes. Thank you Would you happen to know what wires are what?

Right? Fuck me for trying to build a project bike. Why would you want to grow your knowledge and learn new skills? Just stay ignorant and unhelpful right? By the way, total time it took to build without going and getting components was 2 hours.

Surprisingly easy. I wired everything up off the bike with temporary connections to make sure everything worked. And tomorrow after work I'm making a bracket for new ignition, lights etc. And mounting it to the bike. Even added in some led tail lights too.

Im rewiring my 1980 honda cb750 and I can't figure out what this pigtail goes to. Red 6 pin pigtail. Wire colors are black, green, 2 yellow and 2 blue. It connects into the bottom half of the engine on the left side just above the shifter/oil cap following the starter wire. (i circled where in...

I've checked it with a multimeter. The issues is within the main harness and since I already had plans to redo the wiring it just got pushed forward a bit

Because I'm removing everything that isn't needed to make it road legal. With in my state is head/tail lights and horn

Yea. Wire, connectors, key ignition, switches, h4 plugs, start button, and 2 inline fuses one for 10 amp. Second for 30amp. Came out to be I think 103 USD

I checked all the switches again today, I rechecked the switches today and now I'm not even getting power out of the main harness to the front assembly at all. I was hoping the issue wasn't in the main harness but it looks like it is so I'm gonna just make a bare bones harness. I should be able...

I did find this diagram and other than a horn, its what I need

I did, I cut out the splice and repaired all wires, checked and rechecked all fuses,, Still nothing. So since its seeming like I'm going to have to tear into the main harness, I want to go ahead and remove pretty much everything, entire gauge cluster (I'm getting new gauges and will wire them...

You wouldn't happen to know what gauge wire I would need would you?

TLDR: Issue with headlight caused me to say fuck it and redo the main wiring harness. I will update this daily and add pictures that helped me until the wiring project is done. Item list will be at the bottom. Photo labeled HONDA_CB750A I used for reference when doing the tear down Photo...