Originally Posted by gymply
The '99 and early '00 model Twin Cams had a ball bearing in the cam plate for the rear cam. My understanding is that the problem was the ball bearing failing due to the side loading of the chain cam drive system. HD changed the ball bearing to a roller bearing and the problem was solved. In the video link posted by JerryH, the cam plate is the (I believe) '07 and later design that uses parent-bearing material instead of outer cam bearings. That may be confusing.
After watching the video,I spent some quality time with the shop manual. I think I'll take a look at the tensioners, at least.