I read about the primary geardrive by gear wheels too.
A surplus in transmission, but harder depending load changes and you cannot fit different flywheel weights so easy,
(this is maybe not so important for a road racer?)
I don't think the behavior of the Bultaocs in general beeing easy to start backwards will change therefor?
(The engine doesn't sound healthy when running backward but works, staating the engine backwards by rolling from
a mound is indeed very easy, have tried this in my youth times with good results. (Certainly a typical teenage stupidity back then when everything was cool that worked when it was not suppose to do.