had my wife follow me in the car, wanted to check my speedo reading against the gps to see how far out it was, was pretty spot on actually but thats not the problem. she said that when i gave it plenty(as much as you can give a 250) she said that it was blowing some brown smoke. now i redid the carbs a week ago and hasnt been running to bad, still think theres a vacuum leak somewhere tho. adjusted the idle and mixture screws as close as i could work out from the jap manual. question is, is it still running rich or lean or is it normal to have some smoke when the throttles been ripped? thanks for any replies in advance.