This my old junker I threw together for about $80 total.
I drive it around the local dirt track and drag strip infield. According to my MPH app on my phone it tops out at 31 MPH.
Just a smaller rear pully and larger tires to change the gear ratio.
I build much nicer ones with quiet exhaust that I have sold to people that use them for racetracks and campgrounds and whatnot.
Since this picture was taken I have changed the exhaust to dual pipes out the back and of course finished up the paint.
Its blaze orange with Camo panels now. Very quiet now.
![](http://oi65.tinypic.com/2d1v8ma.jpg)