I'm totally stumped as to why my quad won't start. It was running fine, until I replaced the head gasket and valve cover gasket. Once the engine was together, it made a clicking sound, so I replaced the starter and the solenoid, just to be safe. Now it just cranks, and won't even try to fire. The quad has air, good fuel, and spark. It also has compression. (I checked) Any help would be awesome, this issue is getting the best of me.