When I start my bike after a short stop for gas the oil light stays on until I rev it a little. It never comes on when I'm riding, just after starting with a hot engine. Is this normal?
could be that there is oil in there that is actually to thin.
so, if you don't know what oil is in your bike, i would suggest removing it and using good synthetic 20/50 made for aircooled vtwins.
if that doesn't help...overcheck your connections, lines and the oil pressure switch.
if you can't see anything wrong with that, you gotta check your oilpump.