I posted something similar a few days ago on OTN I was told 2 things... 1. "Jump up! There's a fundamental change that has to happen in your technique. Generally when you start pedal kicking you rely heavily on the pedal kick itself. Unfortunately, as you have found out, on very narrow obstacles that just won't work. Try to use your body more. Preload your body/tire and think about jumping up almost more than jumping forward and just give a short stab at the pedals." 2. "Your biggest problem is probably letting the brake off too early. Try to consciously delay letting the brake off until after your comfort point." I'm still working at it so I'm no pro, but letting the brake off a little later, and kicking just as hard, but with a shorter stroke has helped the most. I've been practicing this on a small concrete parking bumpers, and working on increasing the distance. Im getting better but not consistent yet.