Ok so I've been having a stumble problem so I figured I would pull te plugs and take a look. Well they were all the same color kinda dark(rich) but only gapped at .22 instead of recomended 28-32. So I regapped and started and noticed when I blip the throttle it looks like fuel vapors coming out the intake side of the carbs. It seems like when I roll the throttle on it doesn't do it but when I hit it it's noticeable. Any ideas. Also the slides seem to be a bit jittery? Help me out.