this is what it says in V7-2 ABS----------------------------
"Place the sensor plus the corresponding spacers; the air gap should be between 0.7 and 0.9 mm."
V9 motor man just says check correct air gap, doesn't list what it is anywhere I looked, in V9 Roamer & Bobber.
The place it was listed was in the sensors trouble shooting section.
If the part # is same for V7 & 9, tone wheel & sensor then air gap would be same also.