Anyone know the base settings for the Mikuni Pumper TM33 Carb for the KLX250? It's different for the KLX300, as it will run too rich. I have the carb and its definitely rich. Thanks!

 

I see from your post on TT that you don't want to add noise by opening up the exhaust. You may get partial relief to the too rich condition you seem to have now by drilling a 1/2" hole in just the first plate in from the end of the muffler. This won't make the bike much louder at all but will help a bit.