The oil cooler of the BMW R100GS is located in such as way that it damages easily during a fall. Even if relocated, it may be damaged. Either the hose bursts or is squeezed (often by the crashbars) during a fall. Or the oil cooler starts to leak. Spares are difficult to obtain in the desert, and in many cities as well. A good solution is to carry this temporary oil cooler bypass hose
. It is low-cost, easy to carry and cheap insurance. Now you can stop the leak and ride back to town.
(If you must ride many miles with the bypass installed, we advise that you change your oil more often until oil-cooler operation is restored). We hear that it fits RS and RT as well.