Geoff curtis posted an answer for this 2005 Yamaha V Star 1100 Classic:
"Are u sure it is oil or is it your carburettor dripping slightly and picking up oil off..."
Geoff curtis posted an answer for this 2005 Yamaha V Star 1100 Classic:
"It is likely to be the electric fuel pump my r1 does it if I haven't used bike for a while..."