Possible sites for fuel leak....
INJECTOR
VACUUM LINE AND FUEL LINE
BREATHER LINE
Or the cap itself, or around that 6-bolt fuel pump lid.....or the fuel line or weld seam of the tank?
Fuel smell and leak is a puzzle to me, if it is not due to the heat and fuel being forced out by expansion.
As for the hard starting ....DO you HAVE BRAKELIGHT ON when you pull brake lever and turn key to start??
(if no or flickering brake light , then it is in that little $3 switch by the inner lever end , surely they both don't go at same time - try the other brake lever)
OR >> loose/dirty battery contacts, weak battery, loose spark plug cap or broken inside, loose spark plug, dirty spark plug, valves need adjusting (but you don't have massive mileage for that), loose ground contacts, fuse (near battery)
As for the slight hesitation when starting - this is common, probably stopped on power stroke. No worries - but does go away with a very strong new battery in my experience.
Please keep us posted. These are known to be pretty bullet proof scooters.
all i got for now...
Stig