I have a 1983 Yamaha xt 200. Needed to be fixed up badly. It hasn't been started in a few years. So I started with the basics. When all said and done the bike won't start. I have fuel in the can. I recently cleaned the carb and it is working. I have 140 psi compression in the cylinder. I have a good spark coming from the spark plug. As I try to kick start the back if I am not open throttle I get no response. After I try kicking with open throttle it sounds like it is trying to start but still doesn't. After a few minutes of kicking I will get some backfire and some exhaust. It has a cdi unit which the book states cannot be adjusted for timing. I think the spark plug is firing some other time then at top dead center. I am requesting any and all suggestions. What havent I done or tried. HELP!