I rebuilt my grizzly with a wiesco 686 kit, head ported and polished, uni foam filter, raptor valve springs, and a mudbuster cam. It seems to stumble and run poorly, if i take the drain plug out of the bottom of the airbox, it runs better but it still has a stumble at 1/3 throttle but works very well at full throttle and has lots of top end. Is it getting too much fuel at low throttle? If I snorkle it, I assume it will get worse. If i understand correctly from what I have read, I would need to go to a smaller jet? This carb stuff has me confused.