I have a 2002 Intruder 800, at lower speeds it wants to bod down and almost cut out, I have cleaned the carburetors and changed the spark plugs and still no satisfaction. It is difficult when having to pull out and cross a lane to enter onto a highway, also unless geared down the cycle won't hardly pull it's self up a hill in town, but once it is up past say 15 mph, runs good? What do I try next? Would appreciate your opinion.