The oil filter assembly is located underneath the cylinder head next to the center stand. There are three bolts on the bottom and one on top that need to be removed. You also need to buy the oil filter gasket and the two copper washers for the top bolt. Be careful not to over tighten the top union bolt as it is a hollow aluminum bolt that will snap easily of over tightened.
I’m not sure if this step is necessary but I removed the exhaust to easily access the area for the oil filter.
Lastly, make sure you put the oil filer in the correct direction, the slotted end is pointed towards the front of the bike. This was confusing for me as the manual shows the smooth side facing forward