Glad you got the fan, you will be amazed by how much it runs, the only downfall, is in the summer it blows hot air on your right leg.
I think the fan is one of the most important moods on the 520. I have a 2000 520 and bought 2001rads and the fan as soon as you could get them. Had to wire it myself, but with no problems (2000diferent wiring harness) I have flogged the sh-- out of this thing and just tore the came out of it to find no ware on any parts.
I ride with two other guys that don’t have fans and they overheat all the time. They laugh at me because my fan is so loud hahahahahaha
Keeping the water cool also keeps the oil cooler.