The left hand peg rail, that's the one that will do it. I had my left hand rail worn half away on the front corner. Was getting faster and pitching it in harder every time I rode it untill the peg rail lifted the front tyre off the road. This was after I removed the stock roadster mufflers. With the stock mufflers they would scrape and lift the rear tyre off the road first, the back would step out a bit but no big drama. I had to modify my riding a bit, don't touch anything down much anymore.