To let my aircooled Typ1 engines scream, I decide to produce my own lightened flywheel.
The flywheel is at the moment on my 1915ccm street motor, it runs perfect at 900 rpm idle.
So no worry it doesn`t work!

But it revs up like a motorbike

It`s not the cheapest, but it`s a good CrMo CNC milled high performance flywheel and stress calculated up to Kennedy Clutch Stage 3.