A motorcycle includes a front wheel defining a forward direction, a rear wheel defining a rotational axis, an engine for driving at least one of the wheels, coolant positioned at least partially in the engine, and a radiator assembly containing at least a portion of the coolant. The radiator assembly includes a radiator and an inlet guide. The radiator is positioned forward of the rotational axis and has an upper portion and a lower portion. The upper portion is positioned forward of the lower portion. The inlet guide is positioned adjacent the radiator and includes an inlet opening. At least a portion of the inlet guide extends upwardly from the inlet opening of the radiator, and the inlet opening is positioned closer to the rear wheel than to the front wheel.