swing arm

Someone is trying to sell me a 240 kit with wheels for my 2013 Gen 2, but he says its for a Gen 1 and all I have to do is change the front hub. I'm not sure what the difference of the 2 Generations and if this is possible.

Been reading threads and I don't see anyone saying what the used exactly to get the swing arm bolt out. I'm changing swing arms and I'm frustrated because i don't know what to use. Please can someone help asap! I have both side buts off and I know its threaded in there so what do I use to turn...