If you have compression, spark and fuel you should start …. So try draining the gas, tank /carb and take fuel filter off and check for water or crap. I take the spark plug out and spin the engine to get rid of all fuel in there, refill with fresh gas and add sea foam. Check the air filter might be plugged. These are basic stuff, samething a shop wound do first.
Mystery solved! The rocker arm tensioner nuts on the exhaust valve had backed off allowing the exhaust valve rocker arm to jump off of the push rod. Back in business! Thanks for the help!