Only things you can do mate, is listen to engine, gearbox & clutch (making sure theres no weird noises),have a ride to feel how engine,clutch & gearbox feel,check for any oil or fluid leaks (once it's warm after you've ridden it), check sprockets & chain for wear, check wheel bearings,spokes,swinging arm & steering bearings for excessive play, check fork seals & rear shocker for leakage.
Hope this is helpfull, I'm bound to have missed something but if I have, I'm sure some smart a*** will let you know
