Not only safe, but attractive. For whatever reason, the XR’s radiator—like the S1000R’s—is natural-finish aluminum, while the oil cooler is painted black. After a day riding in the rain, the too-short front fender left an ugly, slimy trail of road muck down the center of both coolers. Cleaning them to a halfway acceptable level took me a couple of hours with a soft-bristle brush and bucket full of orange-based degreaser. I never did get the radiator completely sanitary, so I just started averting my gaze.