First of all welcome to the HDTimeline forum, where there are plenty of riders and enthusiasts here to comment and help you troubleshoot and enjoy your ride a bit better.
That said, we need a little more clarification...does the hard starting mean the engine turns over slower (starter drag or loading up) or it spins up at normal speed? Check battery and all primary connections...
Do you hear the fuel pump "stir" and stop when you power up the ignition, BEFORE you hit the starter? Fuel is leaking back or loss of fuel "prime" so pump is cavitating or vapor lock in the closed fuel system...
Were you low on fuel when it was hot or with a full tank? Obstruction in the line or you picked up bad gasoline...