Hi. Trying to decide on what kit (and engine) to get. I want a frame mounted engine, Im thinking a two-stroke just because they are generally faster, but I dont know that many brands. the only engine I have seen so far is the thatsdax.com 65cc but I dont know if its a 4 stroke or 2 stroke. I would love if someone could post some good sized engines, I wouldnt mind getting a happy time motor, as long as it is faster than all the 4 strokes. budget isnt exactly a concern, but I would like to keep it 400 or below. thanks!