got this bike from brother in law it went uner in Katrina well replaced starter carb coils and it was running fine this seasor when i started ti wouldnt idle only ran at planning speed would die if i dropped below plane.drained all old gas and changed plugs now dosent start well if i disconnect return lne from carb to fuel tank it runs fine will die as soon as i reconnect this line it has a constant dribble of fuel that runs out of this fitting what do i do now ????