Condition monitoring of the cam chain tensioner in the motorcycle engine

Timing gear systems of motorcycle engines are equipped with chain tensioners, which are subject to premature damage in certain engine models. Early detection of such damage is essential, as it may protect the user from unexpected engine failure while the motorcycle is running. This paper presents the results of research whose purpose was to use the measurements and analyses of vibration signals for the diagnosing of damage to the hydraulic tensioner in the timing gear system. Stand tests were conducted of the motorcycle engine in which new, used or damaged tensioners were installed. The research results allow to conclude that a change in the technical condition of the tensioner caused by wear contributes to an increased level of engine vibrations and that it is possible to detect damage to the timing gear system tensioner by means of measurement, processing and analysis of vibration signals.