Here's what i do when doing u-turns, and although i've passed, i do still do them, just to keep my hand in. First dont worry about wobbling, its natural. When yr getting ready to set off, put it in first, set yr revs at about 3k, (dont worry about it sounding like its revving its n**s off), keep yr foot gently on the back brake, do your lifesaver and then gently let yr clutch out just to the point where the bike starts to move. Let it out a tiny bit as you are still on the straight part of the u. Start your turn keeping everything as it is. Look over to where you intend to ride the bike too and *do not* look at the kerb. You've set everything up for the bike to do its bit, so you dont need to worry about that anymore, just keep thinking about where you are going. Also dont stop immediately that you come out of the u, carry on for 10 ft or so, (you wont get marked down for it) so the bike is upright when you come to the stop. Yr foot will still be on the brake, so press a bit harder and ease off the revs while pulling yr clutch in. Once stopped, switch to the front brake, put bike in neutral and........bobs yr uncle, fanny's yr aunt