You'll find the ability to repair at most npc's that have the option "Goods."After choosing the Goods option you'll see something like this. Choose the "Repair" button to repair gears individually, or the "Fix All" button to repair everything you currently have equipped. The "Fix All" option will not repair gears in your bag that are not equipped.
I would recommend upgrading to new gear, though. This guide tells you where to farm the custom gear for this server http://epicpw.com/guides/gearsweaponsaccessories-guide/To farm level 130 gear materials, you'll find the Messenger of Time on the platform in the center of Archosaur.To make gear with the farmed materials you'll use forges named Weapons, Armor, and Accessories, which you'll find near the teleporters in West Archosaur, Thousand Streams, and City of the Lost.
I have watched a youtube video with instructions on how and where to farm these stuff but I still cannot understand where and how to make them. Your post is the answer, thanks again!