1983 VF750 Carb Issues

don't pull the carbs off the air plenum plate. All the carbs need to come off as one assembly. No need to remove them from the plate at all. The carb boots that attach the carb to the head will likely be stiff and stubborn. Be carfull where you pull and pry as not to damage (i.e. don't pry on the air plenum). Use some WD-40 on the boots.

Once you get them off, they are pretty well straight forward. You have a main jet, a pilot jet, an idle air mixture screw, and a choke pickup tube. In my experience and observation, the choke pickup tube is the one people fail to get cleaned properly. Remove the cover off the vacuum slider diaphragm, you will fine orifices up there as well. One of them connects with the choke pickup tube. Work the choke plungers and spray carb cleaner.

Watch out for the mini washer and o-ring on the idle air mixture screw (don't lose them). They like to stick in the carb instead of coming out with the screw so when you blow in an orifice they fly across the room lost for eternity.

Your model may also have a screen filter behind the needle/seat in the float bowl. Remove the seat to find the filter. Don't mix and match parts from one carb to the next. Only clean one at a time. Some years had different emulsion tubes (the tube the jet mounts in) on the front head than the rear.

Be extra careful on reassembly. Those stiff boots will want to fold over and tear. Lube them up and you may need to use a little hook - you'll see.....