Re: Carburetor Synchronizing

Posted by RodneyCB750K1979 on
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Carburetor-Synchronizing-tp4044371p4044436.html

I tried again today to sync the carbs. I can get them to all agree but I can't reduce the idle below 2100 RPM.  

I checked the throttle cable and there is slack.
I checked the high speed idle knob and it is backed out
I checked the choke lever and it is not touching the carb throttle plate.
I pulled two carb covers and felt the throttle plates.
I inspected all three sync screws and verified correct washer/spring positions.

When I press down on the throttle lever between carb 1 and 2, the idle speed goes way down. Something is keeping the throttle plates from closing completely.  Next step is to remove the carbs for a closer inspection.  

Does anyone have advice on how to reach and adjust the #2 carb idle mixture screw? I bent two small screwdrivers to no avail. I'm gluing a screwdriver tip into a 5mm socket.