Nah, I used to own a twingle (sears allstate puch 250) it was a ported 2-stroke engine with 2 pistons and a channel (port) cut in the head between the two combustion chambers. The pistons traveled up-and-down 15 degrees apart, the rear piston was the intake and the front piston had the exhaust ports. The 2 spark plugs were fired from a common set of points. It used two 3 volt coils in series. (the bike was 6 volt). Essentially, it was a single cylinder 2 stroke engine with a barrier in between the intake and exhaust ports, so, it was more economical to run and IMO ran slightly smoother than an equivalent single piston engine. (due to the slight lope in the power delivery created by the offset phase pistons)