yea i know all about them. i helped a friend about 20 year ago build a couple of these for karts in open class. i think he got some parts from mike back then. we made one a tall deck. we used horstman stroker briggs cranks. also use 3hp briggs flywheel and coil. I don't think i would build one very wild. just mildly built. With Z50 wheels , forks. seat and tank. try and make a honda mini bike??????? some people would beleive it was real!