I may be slightly rich on the jetting, but not horribly. It seems like I have troubles where, if I don't down shift to get the RPM up and just give lots of throttle, the engine sometimes starts missing and running like crap. As soon as I drop a gear or pull the clutch, it clears and everything is fine. Is this fouling plugs? is this an indication that my carb setup is worse than I thought or something?