you take the forks apart and change the spacers in them, i beleive longer spacers if i remeber right, it keps the fork leg from extending all the way. Shorten the springs when you do this or it will ride hard as hell, plus last set we did on a bandit took 2 people to put the sprongs caps back on!!!!!
PS on you arm question i e-mailed you, but heres how i plan on maybe doing this new arm, see pics.
These bolt into the existing rear arm, i hi-jacked them from a thread on www.sportbiked.wsI would make the part that goes into the old swing arm one piece though, part of the main body not 2 bolted in pieces. hope that helps you