How to find a smaller flywheel ? Engineers ?

That company is great!! I put one one my CR500AF.

Could the gearing be changed in the kickstart assembly to spin the motor over faster. Have a set of gears built.
It would require custom gears and more precise machining than I am capable of. Maico used a moon gear assembly vs the style we have in our modern bikes . Kinda hokey …

I forgot that you owned an AF .
What a monster!