I have oko's and mine did the same only after putting cpi's on, never did it with the t5's and same jetting. Im leaning towards rich or bowls draining, I would say rich. Falls flat after a couple of seconds, but I haven't been on it since then. You got a good set of carbs if you got them new, This is the first time I have experienced any kind of mis since I got them, easy to tune.