Good evening people. My DRZ runs great after I finally sorted out the carb (enricher spring removal did it), but I'm still bugged by a noise that I don't know if it's normal or not. Imagine a small hammer sitting on top of the engine, that with its vibrating would tap tap tap on the valve cover. That's as near as I can describe it. I checked the valves, no problem, the bike has only 2500 kms on it. This noise gets stronger when the engine is toiling, and almost goes away at constant speed. Any ideas ?