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Darn it guys, now you got me thinking about this …I always knew that the point gap had an affect on spark timing, hence always careful to accurately set to the factory spec, normally .020. But thinking about in now, seems that within reasonable limits of variation, the only affect will be the range of travel of the magneto lever, either to the left or right. Don’t want to think this too hard, head may hurt.
Wow! my head is hurting… what I said above would apply to a single cylinder motor, but with a twin/ two sets of points, any variation in gap between the two sets of points will have a negative affect on timing of one cylinder relative to the other. Twin point set-up must have both sets of points set at exactly the same gap for optimum operation. The best way to achieve this is by using one of the timing tools at allow for actually showing the instance of point opening/closing using a timing light.
Yes ? No? … your thoughts
Joe B