Standard test, on level ground , tyres adjest to correct pressure.
Hold bars together then go full forward about 5 to 10 yards then reverse back, again keeping the bars together.
If all is adjusted properly you should end up back exactly where you started.
If I end up +/- a yard I leave well enough alone.
In the early days you had seperate adjustments for forward , reverse and lever position
However a lot of ZTRs now have only adjustment on one side, or max forward only.
Another victim of dropping prices. adjustable controls cast a lot more to make.