Hello all, I recently picked up a used XR650R and started doing some basic maintenance. The radiator fan looks very elaborate and expensive ... here are a couple of pictures: I did several searches (here, the XR650R forum, advrider) and saw all the computer fans, KTM fans, and other fans ... but never saw this type. Any idea what kind this is? Looks like it has radiator fluid going up into the unit? It has a vacuum line going to it, not sure what that is for. Seems way too complex for just a fan ... any ideas?? Thanks!