Werks clutch
I really like the Werks clutch with carbon shoes. These things wear like iron. I have one on my XB8EC w/ Ninja Rossi tuned engine, and another on my XT8 w/ OS Speed. I had one on my XB8TQ and never did wear the shoes out in over a year. Just change the bearings as you would any other clutch system. I run the suggested spring with 1 - 2 threads showing and they run great.