hi guys i put fuel into my taqnk for the first time today since stripping down the bike for a re-build, after filling her up and turning the tank to on the tap started leaking from the knob side not the diaphram side im assuming that a seal has gone hard in the time ive had no petrol in the tank, is the tap rebuildable or do i need to find a good second hand tap???

cheers guys kyran