JMP oil temperature direct gauge/analog display The original oil filler plug must be replaced with the direct knife. Please note that the measuring probe is often only wetted with centrifuged oil. A measurement on the oil drain plug, for example, therefore results in a different value. NOTE: Please carefully compare the thread diameter, pitch and length of the oil dipstick with the replacement part! ATTENTION: The air bubble in the sight glass ensures the expansion of the damping oil when heated, No reason for complaint!