I had just been back riding 2 months from having the left rotator cuff fixed - went though what looked like a bunch of leaves and apparently there was a large branch hidden in there. Anyway, just back on the bike a few months and I was not paying full attention because I was screwing with a sticking throttle, and the front in washed out doing about 3mpg, fell on the side and heard something go click. that was feb 2012, wanted to get it done all last year but work kept intruding, finally got it done July 11th so about 8-9 months. The doc the first time around said about 10% a month for healing. I think a knee is easier, at least that is what the doc says...I hope to not have to find out