I'm the kind of person that can't leave anything stock. There is nothing wrong with the way Yamaha set the Z125 up, but I felt the need to stand out a little bit. I wanted a set of lower bars so I jumped on motorcyclesuperstore and found a set of Bikemaster superbike bars. They are near 2" lower with about the same pull back also about 1"1/2 wider overall. The grips are Bikemaster revolvers.
Here is the box of fun
New bars meet stock bars
ON!!! after a few screw ups I made (broke the little pin on the inside of the right control box)
Overall I'm very happy with the look and feel over stock. I was worried that the lower bars would hit my knees but so far it's not been an issue. The slight lean forward also makes the seat a bit more forgiving. Next up will be some new tires (Boppers), exhaust ( Leo vince or Samurai), Highway pegs, and maybe some lighter rollers.