The ultra-lightweight 3-disc clutches we use on the round track engines use a flex plate so a starter can crank the engine. Those clutches are about 6 inches in diameter. I would assume an engine with a stock camshaft would not like to slow idle with only a flex plate, but above 1,500 RPM or so it should run OK.
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!
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