So. I have put together two of these motorized bikes. One for my friend and one for me. His bike works fine. Cheap **** motors though. Mine was a bust. I have pretty much replaced THE WHOLE DEAL with parts from thatsdax.com. I was happy with every part. I had my jeans get sucked up into my bike and flipped it. Hitting the motor head on the side of the street. It never worked since then because I popped my piston rings. Well I wanted a better motor anyways. So I bought the Dax 69/70cc 2 stroke engine. I put everything on my bike better then my last engine. I am getting a spark. I have 32/1 gas mixture. I have good compression. I have tried 3 different spark plugs (B6HS,B5HS, and the one that came with the motor. My carb is clean. Jetted nicely. Fully functional. But. Bottom line. No matter how hard or fast or long as I peddle and ride. The engine won't fire. Any other ideas?