As Kit said, but do not forget to drain/syphon the overflow tank. Fill from radiator very sloooooowly and "burp" the system a few times (engine running with cap off) and keep filling until no air bubbles appear. Put cap back on and refill overflow tank to mid way. Run for a couple of days and check overflow tank when cold, level should be between bottom and midway.Put the bike on the center stand. Take the front lower fairing off, and the right front fairing top storage pocket box out.
Take the radiator cap off that is under the right pocket box.
On the front of the bike between the oil filter and that little black thing that looks like a tin can (part of the emission junk) and up high about two inches above and between that and the oil filter you will see a drain plug.