Just spent a little time at a GoPed site and they market a modified woodruff key which "cures all" allowing a 10 degree advance. The keyway/stock was wide, so maybe there is some improvement with the timing even using the stock ign. (narrower key stock)
BTW, that is a very clean motor
Clean up was a dry paint brush for the exterior.
If the drive spindle did not have the abrasive worn off, I would have guessed an early crash/accident. And yes, it even came with a steel mounting bracket for a template, would have to rid it of the output shaft.
Who has carb 'twister' for G23? Are they add-on to existing manifold insulator spacer or a replacement twisted spacer? Don't want to get an add-on that won't fit this model spacer.