A number of us have the Garmin Zumo 550 motorcycle GPS. At this point, these units are quite old but are entirely serviceable. There are, however, a serious of typical problems that occur including the buttons breaking loose and falling out, as they have on mine. Recently a repair service was pointed out to me which does what appears to be pretty thorough repairs of these units. Garmin Zumo 450 and 550 Repair Service Garmin Zumo 450 and 550 Repair Service(https://adv-traveler.com/136/links/40451/garmin-zumo-450-and-550-repair-service-garmin-zumo-450-and-550-repair-service)