Doesn't the Triumph have a temp. gauge? All watercooled machines should have a coolant temp gauge, not an idiot light, or in some cases, nothing at all. With a gauge, you'd just cross reference to the owners manual indicated coolant operating temperature range to confirm your coolant status and be able to anticipate when and if your fan should be running and if your overheating or whatever. Otherwise you've got to go with some of the above recommended solutions to address a concern that may actually have no basis in fact. Or, just trade the machine in for air cooled technology, which NEVER overheats.