I had mine at .060" and I had a really shitty spark [at the coils, not plugs].
If you say that a larger gap retards the spark, does a smaller one advance it? What if I were to gap my TR55s at .045" and cut the tip off [exposing the electrode]? Would that make a difference in anything?
*NOTE* I know exposing the electrode decreases the life of the spark plug significantly, but it'* all in the name of power.. and besides how many miles could it kill off one? They seem to 'work' forever in a properly running engine. My old ones are a testimate to that.
'89 SSE - GX3 -190k, 155k on body - Back for another ride.