Add to this, you can counter balance the bike to tighten your U turn. This is especially helpful with some of the bigger/heavier/older bikes. I shift half my butt to the outside, keeping myself on top of the bike while leaning the bike in as much as I need to. It takes practice learning to maintain slight rear brake pressure while doing this, but that's what practice is for! With this method, I can easily U turn an 80's goldwing in a single 10' wide parking space!