I wouldn't drill them too much bigger. Did you clean them really good after drilling? I run a piece of wire in the idle tubes to be sure. I drilled mine out and it immediatly clogged up again because there was crud loose in the float bowl. It was just taking slightly bigger particles to clog it. I would also take the top of the carb off and look into the float bowl to see how much crud is in there under the floats. Just remove the floats and clean it out good, be careful not to get carb cleaner on the plastic accelerator pump, it could wreck it. I pulled a lot of these carbs apart and they all had crap in them. You also really need to blast out the passages with carb cleaner. Something clogged it to begin with, so its likly more crap is in there still. Also spend $3 for a new fuel filter.
The drilling is not always a permanent fix, you might have to get in there and clean out the idle tubes again, this just helps to pass slightly bigger stuff without clogging. I also find it easier to just take the top of the carb off to get to the venturi stack to do this, and less chance of those little choke plate bolts falling in the carb.
My Carter runs great now, especially after disabling the stepper motor while the metering pins were fully extended and doing the rest off the Nutter bypass.
Last edited by Buzzard; 10-21-2002 at 04:26 AM..