I have close to 50k on the original 2011 103 and am playing with the idea of putting cams in. I have never done cams on a mc before but have done plenty of V8s in my time. It is my understanding that the twin cam motor uses needle bearings in the cam bearings. It would seem that they would get less wear than say your brass automotive equivalent and those are just getting broke in at 50k. Is there any real danger to just swapping the cam without swapping the bearings?