I second the boards for the reason I can change the angle but never over 90 degrees. I'd not be able to ride a sport bike today unless I had training wheels my knees lock up when cranked past 90 for too long and i'd bite the dirt on a quick stop. Try using a topical analgysic (sp?) like Voltaren I put it on when I go downhill skiing, it helps. Boards also help with strain on lower back changing the angle of your hips a little.
