So,.. after some long periods of thought (which makes my brain hurt) I've come up with a postulate of sorts...
There are 3 variables:
-which side of the bike the gearbox is mounted on determins the spin direction relative to the gearbox
- which direction on the output shaft is used to exit in the direction of the gauge (being mounted with the output cable above or below the axle)
- which way the gears are cut to spin the cable pinion and cable
Unfortunately, if you chose any 2 variables that automatically dictates the third one in order to get the cable to spin in the proper direction for the gauge to work.
IN the case of chosing the timing side mount with the output cable exiting above the axl, the norton speedo-gearbox gears are cut the wrong way to spin the cable properly for the guage. This means you have to change a different variable to change the spin direction of the output cable OR change the angles to their mirror opposite directions on the drive gears.