Replacing the clutch in my sons CR85R. Everything was going fine until I got to this center bolt on the clutch assembly....***?. I cannot get it off! I just broke one of those studs trying to get leverage !!!!!!.... Is there a trick to get this thing off? The manual refers to a special tool, but then notes that it's not available in the USA! Any ideas? I wanted to get this thing done today...but after breaking that piece, guess I'm SOL for now.