Automotive GENERATORS used to be used on the International Cub Cadet lawn tractors of the mid-1960s as both a generator for battery charging and as the starter motor for the 7-10 hp Kohler engine.
The Yamaha RD200 two-stroke twin did the same thing, it used a dynamo rather than an alternator, and used it backwards as a starter motor.
Tuned mine up and had just over 100mph on it! (on the clock of course..)
They were two strokes though, yuck.
They might be fast but they're also noisy, dirty and thirsty. Get a 600cc four stroke, same performance if not better, cleaner, quieter and half the fuel cost.
I thought they were higher revving?
I've never ridden a two stroke (thank goodness) so I don't know.
I don't see any theoretical problem with that; just the practical problem of having to start with DC and invert it (with associated inefficiencies) to 3-phase AC and control that. So simpler (and even perhaps cheaper overall) to start with a BLDC motor.What's stopping someone disconnecting the bridge/regulator, applying a DC voltage to the field windings and a 3 phase signal to the 3-phase part, just like a BLDC motor?