shock is off a rm80 and set preload for son's weight.tried a strut but son is not quite heavy enough to make it work.bike was a handfull to ride that way.swingarm is stock.brought two and i am having 3" put into one.this is at a 400' dirt drag.banshee is a 10 mil stroker with t-rex cylinders and head,cpi out frame drag pipes,38 lectrons. i put it together for son's friend.switching to alcohol this weekend.8/12 we race at newtowndragway were purse is 1000.00 to the winner with 60 + bike field. keeps me in touch with the yung'uns.