Im looking for a little help with a '97 gettting around 16 mpg. I just got the bike so I don't know any history on it. the only aftermarket items i notice is the supertrapp exhaust. One of the coils was bad so i converted it to COP. Everything else seems to be stock. Each carb is missing a plug just to the left of the A/F screw. I rebuilt the carbs and ran it with out the plugs and also tried plugging to holes and it made no difference. It idles/runs the same plugged or not. when I pull the spark plugs I can see that 3 of the cylinders are running very rich. The A/F screws are all at 2.5 turns out. I've tried adjusting the A/F screws and on three of the carbs I can turn them all in and the bike doesn't even stumble. Thoughts?