07 450ER, throttle hesitates for a split second from idle, or if throttle let off, such as landing from a jump etc, (it almost dies before it picks back up). Now I'm pretty sure the quad set for a while before I bought it, as it was a repo, so I did change out the gas, now on previous post it has been recomended clean the carb. but I can't recall seeing step by step on how this "should" be done. Do I pull the carb off and soak it in something? just spray the inlet with carb cleaner real good while running???? or Im sure its somewhere inbetween. I'm running a K&N air cleaner with the snorkle removed from the air box lid but nothing else has changed. should I remove or cut air box lid??? then re jet before putting on exhaust or wait and do it all together. all suggestions are appreicated.