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78 gs750 carb problems

  • Thread starter Thread starter Rama
  • Start date Start date
Big T said:
Guys,

All those fuel screws have the tips snapped off - are the tips still in the carbs?

I've never seen a Mikuni with needles like that
Click to expand...

Actually, those aren't the fuel screws, they are the air screws and they are machined that way. The passages in the carbs are clear.

I have never seen this type of needle before either. The marking is 53H and in the online diagrams at bike bandit and several other places they appear to be stock but when I got to looking really closely at everything they fit really poorly in the slide and the arm that captures the needle in the slide so I don't know.
 
Yeah those are the air screws...

Those needles are indeed odd, they don't look like they're too slow or anything, taper looks roughly like a set from a set of VMs but yeah..never seen those before.
 
chuck hahn said:
Sorry brother...The vms I have as donors have the stock 1000 needles...5DL36-3.
Click to expand...

No worries. Thanks for looking, I really appreciate it.

Now that I've got new orings for the carbs I may try to reassemble with the current needles and see what happens. Maybe having the pilot circuit functioning correctly will help with the rest of it. If it doesn't work I've got plenty of other things to keep me busy with this bike for the weekend and will get some new needles ordered.
 
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