I bought a 94 R100GS and when I removed the cover for the oil filter, I saw the black rubber ring sitting loosely against the oil filter. When I pulled out the oil filter, it was #11421337570 which I believe is the shorter hinged filter for bikes w/o oil coolers. According to the fiche, it should have been #11421337575. I had rode it about 70 miles this way but have no idea how long the PO had ridden it this way. The bike runs great, I"m just curious what the implications of running with a filter too short? Did this allow the oil to flow through and bypass the filter? Any oil pressure risk (never saw the light on while I was riding it).