Restarting bike after many years unused

[Farjo]

My 2003 Fazer has been unused since about 2015. For time it's been in a garage. This summer I've bought a new battery and changed the petrol. When I press the ignition button it turns over, and seems to want to start, but just won't.


Could it be because the petrol between the fuel tank and the carbs is still the old stuff? If so is it a question of trying and retrying until the new fuel reaches the engine? Or are there other likely causes?


Thanks for any help.