Doc Sprocket
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This thing uses a 120cc Lawn Boy 2-stroke, and a Comet 30. It's basically an R/C mini-buggy you drive from a distance. I tripped on this during a google search for some 2-stroke info. Check it out!
http://www.fieroaddiction.com/buggy.html
http://www.fieroaddiction.com/buggy.html