
Tools required : 10mm open ender.
Time : 5 minutes.
Skill required : Virtually none, too easy.
Firstly measure from your shifter to the ground so that you can ensure it stays in the same comfortable spot after the job is done.
Loosen both 10mm lock nuts on the shift rod.
WARNING - FRONT NUT IS LEFT HAND THREAD
Remove the 10mm bolt from the linkage on the gearbox shaft spline.
Slip the linkage off the spline and rotate it one tooth clockwise. This will raise the shifter quite a lot. (I am doing this from memory, it is possible it may be anti-clockwise)
Finally adjust the shift rod to place the shifter back to the original measurement you took at the start of the excercise.
Blaze mentioned to me that he was missing gears on his bike, and after this mod the problem was fixed.
It is simple and quick to do.