OK Guys, I was poking around the 'net and came across an engine supplier that has Tecumseh 2 stroke engines in 49cc, 85cc, and 139cc. Anybody have any experience here? They have float type carbs that would have to be replaced. No weight figures were listed (that I saw). Also the Honda 31 (available for $180 + sh), any possibilities this would work well on a Dymond 100" Rearwin Speedster? 4 stroke would sound cool!