"Live and learn!" I was not familiar with that particular brand name. Most of the engine failures I've seen that could have been prevented by a governor have involved spun connecting rod bearings and/or stretched connecting rods, or swallowed valves. Failure of a single piston from overspeeding would be pretty unlikely unless it was collateral damage from a valve coming adrift.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!