I have an all stock 2006 banshee. I just installed a K&N air filter with the billet adapter for it with no lid on the air box. When i hit 4th gear and give it more than half throttle it starts bogging and if i keep holding the throttle wide open it will backfire. I have to give it less than half throttle for it to pickup speed again. Gears 1 to 3 work fine at full throttle but i still feel some bogging. The bike did not bogg before when i had the stock air-filter and air-box lid on, it started after i upgraded to the K&N. How do i fix this bogging problem?