Having cooling system problems? It may be your radiator cap. Replace it with this stock replacement 13 psi cap. Replaces Polaris part #1240044 and 1240508. Fits the following models and more: 2001-14 Sportsman 400, 2006-07 Sportsman 450, 2000-13 Sportsman 500 (All models), 2014-17 Sportsman 570.