I have an 1984 200X with a lot of mods,i was just out riding the other day 4 a bout 3 hrs and was ready to pack it up when it started missing,it would not rev any higher,then when i shift it will rev to a certain limit and then will stop and it keeps missing,and we can't get the plug out,so,PLEASE HELP

 

Either you sucked some dirt into a carb jet or there is water in the gas.(or both) or water in the cdi box on the side of the head, I would clean the carb, dran the fuel with the petcock turned to reserve and spray some electric cleaner inside the cdi houseing. any smoke when it misses?

 

no,there is no smoke,just missing.We are gonna take it down to the motorsports place today.see if they can figure it out,i am gonna try like u said,i have no air filter box lid,and ran in no water.