Hey everyone, I just recently bought two quads as a bundle, they are both red cats one is a 110cc and the other a 200cc. I got the 110cc running perfect and I have no issues with that one. But the 200cc doesn't like to crank under load. What I mean by that is when the spark plug is installed the motor will turn over like once and then act like the battery doesn't have enough voltage to keep it going. But when I remove the spark plug the motor turns over with no problem. Its not a voltage issue, I just reclearenced the valves and they are in spec, the exhaust isn't plugged. Im lost and unsure what to do or check at this point. If anyone has suggestions or has experienced this problem please let me know.