Petrolly Smell

[Fazerider]

The tank will blow out a bit of vapour through the breather if you park it in the sun or after a run as the engine heat warms the tank, but the breather pipe should mean that comes out low down at the back of the engine.
You wouldn't normally smell petrol while you're riding though, try lifting the tank and have a good look at the underside and the hoses/pump/filter in case you've a tiny hole or split somewhere.