Well, I personally would be VERY hesitant to put a gasoline engine- even a small one- in this model. I'm exceeding the power recommendations as it is; the book says don't do over 1.25 ci on a four stroke, due to vibration issues. My Laser 150 is exceptionally smooth, so I think I'll be okay; but I've never seen a smooth single-cylinder gasoline engine, sorry.

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