Bike idles but stutters when you accelerate.

[bajabryon]

I have a 1980 650g special. Bike ran fine at first but would not charge. We replaced the stator and regulator. Everything else checked out good and it started charging. As we put the bike together the coil pick up got clamped in the case. We fixed the wires and the ohms checked out good. Tried the bike and it will idle but stutters when you accelerate. Someone told me it was the carbs. We cleaned and replaced the jets. Did not improve. We borrowed a gonzo box from Jim and the bike wont start on the gonzo. I am not sure what else I can test. This is my son's first bike.