Olol, some are already made, races are very easy to make, provided you have the right ideas. All you need to have in mind is a set course, maybe a circuit or a straigh line, maybe even a "There and Back" thing like in Boomerang by Cooba, and the course mustn't allow some form of being lame. Add some interesting obstacles, and maybe shortcuts to spice it up for those more experienced. And also, race is the best gametype ever. ;D