You will need a good set of disc brakes for the fireball as there is no v-brake mounts. Rigid forks will work, single speed conversion, just add lighter bits as you go along. I have a 2011 fireball and I have a MOD as well. I am also looking at converting my fireball to more of a street bike as well, I'm thinking inspired forks, echo wheel set, light seat/post, single speed conversion, hope stem and eventually new brakes. I'm already running avid elixors but they aren't great