jbonz
In the pics of your left turn your really twisting your body A LOT. Also take your head and move it a whole foot or 1/3 meter (where ever you are) to the left for the left turn. The way your body is, you would fall off if you let go of the bars, with out any bumps. You probably bump steer a lot like that. Let your head lead your body, look through the turn, keep your head UP.