Left side carb problem

[scartissue]

I have a 1983 suzuki gs650 twin air cooled converted into a bobber. No mods have been done to the engine. When the bike is idling the right carb/cylinder run the bike. The left side exhaust pipe is luke warm at best, while the right side is hot as it should be. If i put my hand over the left carb, The bike revs up a few thousand rpm. The left side fires and has plenty of compression. Also there is fuel getting to the cylander. vacuum leak? carb completely out of adjustment? or am i dead in the water? Any input would be greatly appreciated!

[tkent02]

Let me guess, it sat on the side stand for a long time?

What maintenance have you done so far?

And which engine is it? GS650 is not a twin.

[Guest]

I believe he has a GR650

[tom203]

Left side is leftside as you sit on bike ??? OK, seems your left carb has plugged idle circuit and/or misadjusted idle/air mixture screw (the idle circuit gets plugged up real easily). Have you clean the carbs recently?
Are you still using a vacuum operated petcock connected to right carb?

[csgoh]

Check the plugs on the left side. If plug is wet with fuel, try sucking gently on your vacuum tube.

If fuel comes out towards your mouth, petcock is dead.