85 yamaha xt 600 drips gas after it has ran and

Did you also change the pickup(pulse) coil part of the CDI system? A faulty one can stop sending the correct pulse when it warms up, an ohms test on the part won't always show the problem especially when engine is cold

Might be a problem with your side stand switch, if the bike thinks the stand is down then every time you put it into gear it's going to cut out. Try manually operating the switch. You can also disconnect the side stand switch and connect the wires on the loom side directly together in case the switch itself is faulty and can't close the circuit to allow starting.

sounds like it may be running out of gas under aload it might be carb trouble

check the float hights are all the same hight remove the carbs then the float bowls turn the carbs on the side so that the floats sit just on the needles and see if they are all on the same hight i would check the air filter first and the spark plugs make sure that they are not black and also check the float needles for damage and that there isnt any thing stopintg them from sealing

OMG! men i got exactly the same problem and tought i could repair it myself so i took the bike apart (thinking that a fuel line was craked or something) but when i look everything seemed fine so i did more research and it was coming out from the carburator so i took it to the dealer and got it fixed for about 600$ and everything if perfect now (mine is also a 2002 one)