The Mikuni VM24-512 is supplied with the following factory jetting installed:
Pilot jet 40 (VM22/210), Needle 5L14-4, Needle Jet N-8 (864 Series), Main Jet 210 (4/042), Air Jet 0.8, Slide Cutaway 1.5 (VM26/21), Needle valve 2.0 (VM26/26)
Mikuni VM24-512 Dimension A= 35mm, B= 80mm, C= 116mm, D= 43mm
This seems to be the best set up for the ttr125 put air idle at 1.25 turns out, main jet 160, pilot jet 25. Needle jet set at 2nd from the top.