07 YFZ450 starts, revs high, shuts off

[Race4Yamaha38]

i have a 07 yfz450 and just had the carb apart to clean it and put it back together and when i go to start it it will start up with the throttle pushed in the whole way and it will rev high for a few seconds and then shut off and the only way to keep it running is push the throttle. any ideas?

[QuadforceDavid]

Did you fix this? Any updates?

Did you take the fuel screw out and possibly not put it back in correctly or all the way in so the pilot circuit isn't working correctly? It sounds like it's not getting any fuel at idle.

More details....