Hmmm...well...all the race bikes toss the plastic bushings too. Garunteed broken after one good track day, nevermind weekend races and practice, or an endurance race. Nothing like having the bike get the shakes, coming off the track and then being able to shift the rear swing arm back and forth about 1/4 inch. Feels good in those high speed corners (NOT) that is, after you remove seat foam from your sphincter.
I think this bit is going back. Let someone else test it out. I plan to work this old dog.
Thanks guys.