Follow up test with a CDI ignition

Bewy said

Turk,
Not trying to be argumenative, but offering a possible reason for the retardation. Timing lights typically use a Xenon lamp, not sure of the light source in your m/c. Either type, a certain amount of time is reqd for the lamps to come on [ illuminate ]. The crank does twice as many rotations at 6k compared to 3k. But the time period for the light to illuminate does not change with rpm. At 6k, the crank has rotated further before the timing light comes on...& shows up as retarded ign. So is the 'retard' [ or some of it ] the light playing 'catch up' because of increasing rpm?

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I’m not saying that’s not possible but how do you explain a points distributor showing no retard or very little retard?

I don’t know the answer to that.

And that of course goes back to using one timing light.

Using the dyno timing light, then going home and using your timing light (not you in particular but you as in anyone) and then going to the track, forgetting your timing light and borrowing a light at the track.

I’ve seen that before. You now have the potential for inducing error by 200%.

I need to buy a scope but I haven’t had time to look around and see what’s out there. I need to and eventually I’ll get one.