Robin, Know exactly how you feel. When I last rode more than a short hop, my left knee hurt. Nothing was different in my setup. I think it was attributable to lack of riding this time of year, plus my bad habit of sitting with my left leg underneath me. Plus I think we are to the age where we are not a bendable as we used to be, and need to account for that. Stretching, etc. Course I was never very flexible as a lot of people are.