Jake2005

is it a big job?

hi. I've recently got a txt pro 250 and have had nothing but problems with it I'm kind of clued up to a point on bikes and I'm now stuck. the bike when trying to idle is high so I turn the idle down and then the revs start jumping up and down. it was running but popping upon messing with the fuel screw I've managed to stop that but when revved the bike stays revving for a second or two then goes down it then cuts out and looks asif it ain't getting enough fuel but adjust the fuel screw any more and it bogs and floods the bike I've cleaned the carb many times and the air filter my next course this weekend is going to be taking the top end of the bike apart and regasketing everything including the exhaust (doesn't sound to be blowing but may aswell for piece of mind)... does the carb also have a seal in the bottom as mine doesn't have one in but thinking also to seal that incase it's leaking. thanks in advance