I agree but as I stated before, if ONE wire strand is good and all other broken you will still get GOOD continuity! True continuity test is voltage drop.
Just a thought, can you run new test wire if it is straight wire and not spliced one!?
Guys basic engine operation, if proper amount of fuel is introduced to the cylinder and even if that cylinder does not fire, that same amount of fuel will be compressed out of cylinder into exhaust.
If we have SO much fuel that is pouring out of intake boots than we have exorbitant amout of fuel...
Obviously you missed something or did something wrong! I rebuilt my carbs following these instructions once and my bike started right away with no issues and only needed minimal adjustment during sync procedure. Since you said you have carbs out I thought to share these instructions with you...
According to web search CB750C (RC06) production ran from 1981-1983 so your being 1984 doesn't sound right. Now this info apply to US, maybe it is different for Europe, since you are there do some research.