My harley 1999 sportster sport runs great... problem is when I put it on reserve it dies out and is hard to restart... if I fill it up again... it runs excellent... I am thinking it has something to do with the carb float or one of the jets... any ideas? Much appreciated. Wpd

I found the vacuum tube to the pet cock was disconnected... the rubber tubing on this bike needs to be replaced because after 14 years old it is dry rotting!