What is the hole on the right side of the engine for? and will it hurt if dirt gets there during a ride, or if water gets there while washing the bike? The screws holding the shrouds on keep vibrating loose, after 20 - 30 minutes of riding around the yard some of them are almost ready to fall out. How can i stop them from coming out so easy, and what other bolts should i check for tightness on a regular basis? the manual lists about 100 of them... are they really all nessicary? The front break rotor also has some slack, not where it mounts to the hub, but between the rotor and the part that mounts to the hub. is a little slack there nomal, or is there a way to tighten it up? To check the valves, do you really have to remove the radiator?