Just always keep an eye on your plugs to always make sure your jetting is good, check compression every once in a while, and hope a crank bearing doesn't go out, or something stupid like losing a circlip, you should be pretty alright. If something just plain breaks and you maintained everything well, it was just meant to be and you will have no idea. And it is usually true, your bike will run better than it ever has before right before something blows.