As I understand it, ALL fuel injected bikes have fuel pumps, I believe it's a required component. Fuel injectors are just 'open/close', and they have to have some pressure behind them. There might be some exotic system I've never heard of but if it's a 1500FI, it has a fuel pump.
I do not know if the carb model is gravity fed.
EDIT: I did a quick google search and found a few references to a fuel pump on a 1500 carb, so I think it's reasonably safe to say if you have a 1500, it has a fuel pump. On a lot of bikes the fuel pump is inside of or recessed into the fuel tank, to save space.
"8 But God demonstrates his own love for us in this: While we were still sinners, Christ died for us."
Romans 5:8 (NIV)
2014 Kawasaki Vulcan 1700 Vaquero ABS SE
iPod Connector Kit, Kuryakyn Highway Pegs, Mustang Touring Seat, Marvella's Hitch, Kuryakyn Trailer Wiring Kit, Haul-Master Tag-a-Long Cargo Trailer
2011 Honda Shadow Aero 750 (Wife's)
Memphis shades quick-release windshield, OEM Solo Seat, Mustang Fender Bib, Chrome Solo Luggage Rack
Past: 2006 Vulcan 900 Classic LT