I just put a K&N air filter on my bayou220. Now 1st gear has more response 2nd has very little responce and 3rd and 4th have a lot more responce. My question is since 2nd is like my power gear for hills and mud. Do I have to rejet or may it need adjusted? I was having starting problems and a little backfiring when reving engine in nutral, so I made the carb a little leaner. now it starts great. any help would greatful. thanks