i've been having problems with my bike running with the fuel valve on the "on" switch. it starts up fine with the choke on, but as soon as i let off the choke, it seems to just stall out. the only way i can get it to run without choke is when i turn it to reserve. does anybody else have this problem? if so how do i fix it?

 

Some similar stories here in the 250 section that I have read that may pertain to your situation.

 

HOW full is the tank?

 

the tank is full. it happens even right after i fill the tank