I´m a member of the stofbefox endeuro social riding club and ride a 2003 ktm450exc myself.At the moment i´m having problems with my carb settings.When i turn the idling screw all the way up, the bike idles but when i start riding there is a delay on the reves going back to normal idling.When i turn it back down a little the delay is gone but the it stalls when revs goes low. The mixture screw doesn´t make any change to the idling.Do i have to change to a bigger or smaller idling jet.Please let me know if you´ve got any advice.I want to race this weekend and at the moment it´s not that nice to ride my bike.