Modern Vespa

Do I accidentally left the fuel tap on overnight. What should I do? Some gas was on the floor. Should I try and start it?

You might have to close the fuel tap, remove the spark plug and crank it for a little bit with the electric starter. Put the spark plug back and crank it again or you can also push it.

I flooded my scooters really bad in the past, so bad that my expansion chamber would pour fuel from the tip of the silencer. You would have to open the fuel put it in first or second gear and push it for a while, eventually it will start in a rich and sluggish way. Don't use the choke though.

Did as you said and worked like a charm. Thank you. Thank the lord for this forum.

^^ I am glad it worked out. I found myself on that situation many times and I don't have the lungs that I had before so I try using the electric starter to "flush" the fuel left. I learned though that the easiest way to prevent the flooding and to start the bike easier is to close the fuel tap whenever you are not riding and again open it whenever you are ready to ride. I wouldn't trust the float on the carb.

This was the first time I forgot to do it. Simply an oversight. Thanks again.

Should be able to leave the fuel on while parked. If you leak fuel when leaving the tap on, almost every time this is the float needle worn out. They never look worn out but just don't seal.

With a worn out needle you will be using more gas and go slower. Will pay for itself