[alantf]

looks like you may have two problems - fuel and electrical. I'll leave the fuel problem for others more knowledgeable than myself, but if the starter works but not the button, check the interlocks i.e. starter button, clutch switch, sidestand switch. These often go bad, and a good squirt of contact cleaner usually does the trick. Also check the starter relay, which is under the seat, behind the battery. If you can get the starter motor to turn over with the start button, then you can concentrate on the fuel problem.