Lowering the brake lever was a little bit of a fuss getting the cotter pin out and I could only lower the pedal about 1/2 inch but it's fine.
Glad to see you’re working through the issues you’re having, hope it works for you in the end.
Just a friendly reminder since you adjusted your brake pedal, check your rear brake light and make sure it doesn’t stick “on”. The pedal spring on the Z900 has a tendency to not take up the slack if you adjust it too far (for more clearance) which means you could be riding with your brake light on. If it doesn’t stay on, then you’re good!