My buddies 2002 kx250 has a problem. We were riding down a road when the motor suddenly bogged down and now it wont rev. The bike will Idle just fine, but if u chop the throttle, as soon as it starts to rev it just bogs out, and u can let off and it will idle again. If the choke is on, the motor will rev freely and behave normal, as soon as choke is closed it bogs again. Sure seems to me like a carb issue.. The spark plug is new less than 2 hours on in it. We tore the carb out and checked the jets, they all seem clean, we blasted everything out with carb cleaner. While we had the carb off we pulled the reed cage, everything looks copasetic in that dept. Really at a loss of what to look for.. I am convinced its the carb, seems like a MJ issue??