Did I miss this?
Unlike reciprocating piston engines, since rotary engines spin in only one direction they vibrate less and love to be revved at high rpm
Huh?
If a piston engine spins in more than one direction, something has gone very wrong.
As for smooth, have they actually ridden a modern, four cylinder motorcycle?
Oh, and this:
don't forget the Christini AWD rotary DARPA bike:
https://dirtbiketest.com/fresh-dirt/rotary-powered-christini-closer-look/
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