A motorcycle has a heat exchanger adapted to be installed on the motorcycle in a substantially horizontal orientation. Also, the heat exchanger is adapted to be installed on the motorcycle beneath the engine, crankcase, oil pan and/or gearbox without substantial vertical orientation and not attached directly to the engine, except by cooling fluid connectors. Preferably, the heat exchanger is made with finned tubular core elements. The heat exchanger is installed in a suspended manner beneath the motorcycle, so that cooling air may pass over its top and bottom surfaces. Preferably, the heat exchanger is an oil intercooler.