Honda's OEM cooling fan for the X models. This is the complete kit including the wiring harness. On some CRF250X models the wiring harness is not necessary but it is necessary on all CRF450X models.
This is a Do It Yourself kit. Instructions are minor and don't include all possible considerations. In some model years you will have to run hot and ground wires from your battery. If you are not familiar with this type of electrical work have a qualified mechanic install this for you.
NOTE: The CRF shown in the picture is not included in the fan kit.