hi bikie69,.
if im not wrong,vtech has a 15 litre tank,...how come urs is 13
litre?
-maybe u did not use the reserve switch at the left side of ur
tank??
-ur tyre is not pump properly
-is ur bike second hand?maybe the last owner rebore the piston or
change to dynojet or change after market air-filter,spark-plug and
ezhaust etc-etc??,...my advise is to change to standard..

ps:pls update me about ur bike fc after u did what i have
suggested...