Do I need a fuel pump? Help

Hi, I am in the middle of rebuiding  mk1 T5 vespa. I have decided to fit a 30mm dellorto carb to it, will I need to install fuel pump or will it work ok without?

Many thanks.

 

Not really!

but, be carful,[*-)] as when running low on fuel, the float bowl will be higher(or about the same level) than the fuel in the tank causing fuel starvation, but as long as you don't cane it when on reserve/low fuel it should be fine