Well, here's story. We used to have an english version of both on the site but both are gone. They were linked to a member's business site but that's for sale. I used to have an XP200 and used the portuguese manual for the basic stuff like valve settings. Someone suggested using Google translate to figure it out, so there's that option. There is a manual (along with parts) available for purchase at the Qlink motor site:
http://store.qlinkmotor.com/p/servic...-xf-xp200?pp=8
You can also get part numbers for your XP here:
http://store.qlinkmotor.com/c/accessories-parts_xp-200
Member 2LZ has an XP and would be a good source of information in regards to oil filters and mods he's done. Again, a search here will turn up many posts about mods, tricks, and solutions for your bike.
Oh and BTW, welcome to the site!