I just love all of the miss informed ppl on here, first of all with the flame throwers, how it works is you need an engine that is carbed, and you need to have a choke, and you basically have a switch that switches the spark coils from the 8 plugs to the ones in your tailpipe, while doing this you choke the engine and it essentially stops firing and sends fuel/air down the pipes, the engine keeps spinnign just with no spark, and you cycle this. no fancy computers needed at all, now if you were able to get a small spark plug into the exhaust you wouldn't need to kill or choke the engine cuz a 2 stroke engine sends so much fuel out the pipe anyways that there is a sufficient amount to ignite, i found this out when i was building a muffler and test ran it with tack welds, then went to complete the job and even after 5 mins of not running there was sufficient flammable gas in the muffler to ignite and make a small fireball.