sent the person a message. he definitely knows his stuff.
what i wrote him:
"what did you do exactly that makes a 400.00 bike worth 1400.00 to you? there are no mention of parts. give details."
his reply:
"Have you ever ridden a Baja Warrior before? Well if you were to ride it you would know it runs like no other. I put a stage one performance kit on it, which is high flow air filter, choke hold adapter and a new "E"-Tube in the carburetor as well as a.36 size jet, racing spark plug, exhaust header and muffler. It has a torque converter that also adds the the extra horsepower. I have only put 92 Octane with no ethanol"
he has another listed also:
Baja Racing Mini Bike | eBay