Jspeed,
Bvoltz and I have been talking about the many issues with the stock Kyosho engine as far as reliability. He has proposed that his series in Jackson, MS will include a "spec" engine. The engines of choice are the OS 21VG, Sportwerks .26 and Dynamite .26. (all have to be pullstart version). These engines are relatively inexpense (under $180). However, if a racer wants, they can still run the stock engine, so, a change is not mandatory. The pipe choice for the spec engines will probably be the Dynamite pipe (inexpensive as well). Give me your thoughts on this.