Where is the oil filter in a crf100f and how do i change it?

i got a crf 100, right by the kick starter, there is a big black screw take that out, but before that uscrew the cap on the bottom of the engine, but have a pan ready, cuz the old oil will come pouring out, then screw that back on, put the new oil in, screw the black screw in and start that ***** up.Where is the oil filter in a crf100f and how do i change it?
its the cylindrical part inside of the water pump all you have to do is take the water pump off to get at it, i reccomend getting a resable one

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