on A kawasaki oem parts website such as bikebandits they list 3 different clutch covers for sale. Are these just three different thicknesses? is the thinest one the same as a machined clutch cover? This site list them under oem parts so I cant tell if they are stock parts for different altitudes or if they are for performance or what the deal is. Does anyone know the thickness of the common aftermarket clutch cover plates?