Got ya ishy, i've got a gas gas tx 270. When starting the bike from cold it goes fine with full choke. When the choke is knocked off the bike just dies, after 1/2 minutes. I then turn the idle screw and it runs too much, however it does not maintain those revs for very long and once again the bike stalls. This scenario carries on for an hour until I eventually get a perfect idling speed and then it only cuts out occasionally! Any ideas?