Thanks for he welcome
Just for reference, the crosstalk I refer to is not electrical crosstalk... such as inductive noise, or RF noise, from one wire to another. It's actually mechanical/magnetic crosstalk created by the "reluctance" of one pickup, transmitted through the iron rotor, and "picked up" by the opposite pickup. If you look at the diagram of the signal pulse I posted, it is the small pulse 180 degrees offset from the main pulse.
The pickup gap being smaller can increase the crosstalk pulse. At certain RPMs, it can affect the operation of the ignition. I had to take the crosstalk into consideration in the design. However, this is mitigated by the fact that the main pulse will also be larger.
With any design, multiple variables have to be juggled and tradeoffs have to be made. Larger signals are easier to work with, and the gap I used for the design was .6 mm, but small variations in the gap won't alter performance noticeably. I think +/- .1 or maybe .2 mm should be ok electrically, as long as there is no metal-to-metal contact.
To get the strongest signal, you want the smallest gap. But there must be a safe minimum gap. The crankshaft flexes like a rubberband during high-load use. This causes considerable wobble at the end of the crank where the advancer is mounted. When the gap is too small, the wobble of the crank will cause the rotor to collide with the pickup. If the rotor has scrape markings, or if the pickups look worn away, then there have been some collisions. So whatever spec Honda has for the gap should be followed. I'm not sure, exactly, where the .6mm number came from. Maybe one of the 750/1100 guys gave me that number.
