I just bought this bike a month ago. It is an '03 VTX 1800. I went on about an hour and a half ride and during the ride when I got to about 60 mph the engine would sputter and loose power at points. I turned around and headed home. Just at the entrance of the neighborhood as I was turning the corner the bike lost some power. As I approached my house it started back firing and hesitating. I parked it and let it run for a while. It ideld real rough. Before I had gone on a ride I put the highest grade fuel that is available in it and the tank was full when I got home. What do you think is wrong?

That sounds like bad gas or loose battery connectors.
The vtx 1800 is known for bad grounds.
It being an 03 it is so you may have a bad ground, the grond from the battery to the engine block is not present. It was added in late 03 on the retros and early 04 on the c models.
Honda puts gounds on top of paint so the onbly ground it can get is from the threads of the bolts itself. Remove the connection and clean off paint.
I would check the battery terminal first.
The other problem may be the rectifier or stator. Honda makes some of the stators so it is most likely the rectifier.
The 1800 vtx is a fi bike so no carburetor.

Electrical ... check points. You jmight want to run some carb cleaner through it ... change the plugs. Id look at the points or what ever turns the coil on and off, real close.