well heres it is, my bike has engine mods or so wat, it runs fine almost always except...i was riding this weekend and on the street i was hitting top end, gunning it, for a long time, and when i let off and try to give it gas, half way, it boggs in any gear. then i stop and let the bike sit, but when i start riding if it, it would do the same thing. bogg if i hit bout half acceleration. i cleaned my carbs and the problem seemed to go away. but then i road top end for a while and it started happening again. any 1 got a clue? my top end doesnt bogg. its just after holding it there, when i hit it in any gear it boggs, could it be my needles or jets? please help me...