For me it is because of the right foot/brake lever issue too. I dump way more on the left side of the bike, but mostly because I usually turn to the left when riding in open terrain, because I am better at it. I have troubles using the front brake too, I just don't like to do it. I use it almost exclusively on my street bike, but it just doesn't carry over for me. What it finally took for me was to go out and run a bunch of powersliding circles on a wet sand left in the left hand direction, and take note of form. I then applied that same form to create a right handed turn position. Weird feeling, for sure. I then ran a bunch of right handed circle slides, and went back to lefts, alternating about every 5 complete circles. Then I went to figure eights to work on the transition. I spent about two hours just riding in circles... Time well spent, as I think I improved more in one day than I have in a long time. Practice practice practice. I have heard that the pros barely use the rear. you might think about taking off your brake lever (IN A SAFE ENVIRONMENT) and practicing turning. It will force you to use the front, and will negate the "need" to have a foot over the pedal all the time, as it won't do anything. Do this at your own risk, and reconnect it before trying anything like a track or trail riding... Just do it someplace open and flat to practice fast turning. I say open because you are not committed to a line, and there are usually not any ruts. You can pick a line, and learn how the bike responds without being forced to do something because of an outside influence like a track.