[Kohnke Rebabbitting]

Originally Posted by Synchro909

And I'm not disagreeing with Purdy but there is more to it than that, as usual.
When weight is added to the crank shaft, it is closer to the centre-line of the shaft than the metal one would remove from the fly wheel. It therefore has less momentum as it spins than the removed metal had (and less inertia.)
In other words, if say, 8 lbs of metal were added to the crank shaft by the counterweights and 8 lbs was removed from the perimeter on the flywheel, the motor will be more responsive than before because the 8 lbs that were added are closer to the centre line (and have less leverage, if you like.)

I have never found that to be true in any of my experience.

Herm.