go to the Kawasaki web site,
and under 'owner info' you can link to parts diagrams for your machine. It's a snap to do. I printed out diagrams and made a booklet to help when I work on my bike. You'll find your filter.
The oil qty is probably between 3-4 qts. Your bike should have a way to check the level, like a sightglass window on the lower right side of the engine? Add a couple qts and let it settle, then fill the rest up to the middle of the window.
Oklahoma City, OK
78 KZ650 B2 82,000+ miles
Gray-haired riders don't get that way from pure luck.