Has anybody else tried more timing?

Was installing a new starter drive tonight and decided to advance my timing a little. Definite improvement. I am seeing about 75 to 100 RPM more at WOT with no changes to the clutching. I can feel an obvious difference and the exhaust note sounds much more crisp. It also help at part throttle. As soon as pulled out of my yard i could tell the motor felt and sounded better.

I do have lots of other mods so I may have noticed more of a difference but this should help any 4/500 if you dont mind running 93.