[windrider18]

There should be an oil drain plug off to one side of the filter housing which will drain most of the oil. From the left side of the bike (as you're looking at the filter from below) it should be to the right of the filter. You'll need a 17mm socket to remove the bolt. Then you loosen the filter which will drain the oil that's still in the filter. Make sure you don't lose any parts. I almost missed a washer because it stuck to the old filter. I would also recommend gloves unless you like smelling like oil for the rest of the day. There is no way to avoid getting it all over you due to the bottom-drain setup.

The online diagrams don't tell you much except part numbers. The owner's manual makes some assumptions on knoweldge and doesn't cover everything. I would suggest getting the service manual and supplement (you'll need both) if you're going to be doing your own wrenching.