Im 17 years old and I just started my second mini bike last 3 days ago. The first one failed and was terribly complicated. So i went back to the drawing board and drew a scale drawing. I tried to include a picture of my drawing but im new here so im not sure if it worked. I ordered most of the parts already, except for the clutch. Im also going to upgrade the engine so i can get more rpms. The way i have it gear it should be able to go around 40 mph if my math is right. Tell me what you think.