well i have one myself and is completely naked i use it for racing and having fun and today i had a few friends that came to my house and we raced the bikes my cag against my x2 i have it pretty nicely tuned the carb is like 1/6 open and the idle screw is turned a full turn and the other screw i tuned it with the wheels of the ground. now i took the elctric start of all those thing to make it lighter and its pretty fast,has a great take of, it eats my cag at first but then i fly by my x2. i thought that my problem is that i dont have a pipe that gives back pressure so all the fuel is just been dumped out and not being used. the top speed am reaching is 25 my cag hits about 33 almost 35. i would like to compare whats happening to me with ur x2's.the engine is stock except the carb has the stock carb with the velocity air stack. so please tell me how ur bike runs,the max speed and any tips i could get. ill appreciate it.
p.s am planning on swapping engines,putting a 4stroke 110cc on there