I just bought a 2000 Recon 250 not running. I’m only getting a spark for just a few seconds when I lay the plug on the cyclinder and turn over the motor. The longest that I have been able to get the engine to run is about 5 seconds then it will die. I’m getting 12.90 volts from the battery and around 11.50 while turning over the motor when trying to start itThe previous owner but on a new CDI box, coil, carburetor and decided to sell it because he couldn’t get it to run.