sound good thanks a lot , I order on amazon the bluetooth scanner and I now comparing the 2 wiring diagram z1000 2003 and z1000 2007 are you able to confirme me the color wire of you gear indicator with you wiring color , with the wiring diagram I suppose that the red(gear indicator) is on the white/yellow the black one of you gear indicator is one the black/yellow and the white one on the red/yellow ?Sorry you're having trouble man! The only way I was actually able to figure out my wiring, was BECAUSE the aftermarket gear indicator was there. The gear indicator only has 3 wires, (red, black, and white) so I assumed correctly that red was power, black was ground, and white was K-Line, and could easily see which wire colour the gear indicator wires were corresponding to. As mentioned, L-Line isn't used, so I knew that the 4th wire was the L-Line.
You could potentially google a gear indicator for your model, and going off a photo, figure it out that way!
And yes, the unit MUST say that it is KWP2000 compatible. I was using a scanner that simply said "works on all ECU's", and kept getting error. Then I used a bluetooth scanner that was specifically compatible with KWP2000, and got the reading "no stored codes".