This should be obvious, but have you considered vapor lock? Is there fuel in your line when the bike dies after 100'?
Looks like your fuel line goes up to get to the carb.
I've had problems with that dayglo fuel line before. Had a bike that ran perfect, then my fuel line split, borrowed some of that green line from a guy, and it vapor locked. Replaced it and the bike ran fine.
(I know a lot of people use it without problems, but it's worth checking out.)
Is your gas cap vented? Try running it loose and see if it still stalls out.