I find ATF too light and proper fork oil smoother. I've got Torco 15 weight in mine which might be too light for some folks. I'm 170lbs in pothole city and started with ATF "F", then 10w Amsoil Medium, and then went up to 15w Torco. BelRay 20 weight or PJ1 is quite popular. Any of the major brands are decent oils; Castrol, Motul, or Silkolene for instance. It's just finding the weight that works for you in the brand you can get and/or prefer. Honda dealers here carry BelRay and PJ1. But anything over 10 is hard to find locally these days.
200cc in each of my forks per the manual, but that's an '07 old style. As Arizoni says, newer bikes are 180cc from what I read.