Run the bike for a few minutes to thin the oil to drain better. Take off the farings, really easy and makes getting to the filter much easier. 17mm for the oil drain plug, loosen it, then unscrew it by hand. 10mm for the filter cap, I always loosened the bottom one first then the 2 top ones. Make sure to unscrew the dip stick too. Let the oil drain.
In the meantime, clean your filter cap, and put the new o ring in dry (then when its in, dip your finger in the oil and put a Slight coat around the rubber) DONT OIL IT UP FIRST. Clean your nuts
*Put the filter in, properly, the big hole towards the bike and it should stay on, then add the cap and spring. Drain plug bolt back in.
2500ml, tighten dipstick, run the bike and check the level, up to 2900ml if you change the filter too if I remember correctly. Make sure no leaks and your good.