I just got a two sider PM and my L/R tended to be 47/53. I wondered why? I did bust up my left hip in September. I also noticed that anytime I start or get out of the saddle, the impulsive first stroke was with the right. I experimented with using the left to start up and when getting out of the saddle and got more balanced numbers but not perfect. I also get a weird cramp on the left leg muscle (hamstring muscles semitendinosus?) that is more inside and goes up to the butt. My new leather saddle also has a much bigger dimple where the left butt cheek hits the leather. I never had leg pain or that weird leather saddle dimple prior to the fracture of my left greater trochanter. And, have no idea what to do?? I can ride zone 1/2 no problem but at Tempo or higher, the muscle hurts. Maybe this is why my pedal balance sucks.