raptor wont stay running

[nicktrx450r]

before the quad wouldnt start. i took the carbs apart and found the needle jets were stuck closed. so i cleand them put it all back togeather then it ran good for a little bit. i took it out drove it for a min. then it stalled. i started it back up and it sounded like it was out of gas but it wasnt. it will start but wont stay running unless i hold the throttle in but it sounds like crap. it blows black smoke out the pipe.
05' bike is all stock
someone tell me how to fix this plez.

[xxnightraven73x]

sounds like you need to take the carb apart again does it actually rev up when your holding the throttle or is it just barely running?

[JJ69]

is the choke on?

[tltcracing]

sounds like a jet may have come loose.