i have a 05 cbr600rr with around 14800. just recently i have had a problem with the riding. at low speeds and gears( say im riding in the city with stop and go) when i go to take off and switch gears to speed up some, once i throttle my bike has a strong bogging sounds as if it sounds like a go-cart with a spotty throaty sounds and the bike almost sounds/feels like its going to die. then, after giving it more throttle and slowly gaining speed, the bike all a sudden sounds normal with the smooth throttle sounds and high pitch race bike sound. i do have a k&n air filter and slip on two brother exhaust. the bike shop said the air filter was clean and that the spark plugs looked in good shape. he did recommend i get a power commander. so i did, and had it mapped to my bike and the add on's i have on it. but, im still having the same issues. does anyone know what the problem is and possible solutions. thank you.