Abstract: A system is set forth for cooling the circulating oil of an air cooled motorcycle engine having an oil pump and a mount for an oil filter, oil from the pump delivered to the filter and from the filter back to the engine for re-circulation. The system includes an oil cooler secured to the motorcycle, which may be a radiator cooler or the engine guard A diverter and an adapter assembly is disposed between the filter and mount and is adapted to direct oil to the cooler, through the cooler for cooling thereof, from the cooler back to the diverter for supply through the adapter assembly to the filter and return to the engine. The adapter assembly is disposed between the diverter and filter for certain model engines to turn the axis of the assembly so that the system can be provided for these engines.

Abstract: A system is set forth for cooling the circulating oil of an air cooled motorcycle engine having an oil pump and a mount for an oil filter, oil from the pump delivered to the filter and from the filter back to the engine for re-circulation. The system includes an engine guard secured to the motorcycle, at least a portion of the guard defining a closed chamber having a supply end and a return end. A diverter disposed between the filter and mount is adapted to direct oil to the chamber supply end, through the chamber for cooling thereof and, from the return end back to the diverter for supply to the filter and return to the engine. An adapter is disposed between the diverter and filter for certain model engines to turn the mount, diverter filter assembly so that the system can be provided for these engines.