well heres my 4 cents,{inflation ya know}
i got a +2 swingarm on my shee, and the motor has vitos 404 big bore kit in it,, and i ride the shee in mostly sand pits and do trail riding,, and it is fine for trail riding,,, it turns good, and handles better than stock {i think anyways}
but i would NOT go over + 2 if your gonna be riding trails
i wanted a good balance for sand wall climbing and trail riding, and i think i have found it