250-500cc 1992 WXC 360 won't start (update)

The bike still won't start. I thought it might have been flooded so I took of the pipe to see if there was any gas in it and it was dry. Turns out on of the brackets on the pipe were broken so the pope wasn't actually seated right on the exhaust port. Welded the bracket back together and now the pipe is solid on the bike. But it still won't start. Beginning to think it has something to do with the air fuel delivery. Just to see what would happen I pulled the bike behind my quad and had a friend try to bump start it. While the engine was turning it was poping and smoking but it would not start. Not sure what I should do. It has 143 psi for compression, fresh fuel, changed oil. I cleaned the tank, tank lines, petcock, and the carb. The bike has a strong blue spark. Currently it does not have an air fliter because the one that was on it was disintegrating. Cleaned the reed cage and the reeds looked fine. Any ideas?

Have you looked to see if the flywheel key is still in one piece ?

Ok so you know how much compressions there, your pipe is dry and it pops when trying to bumpstart.
I suggest check carb is functioning so strip it look for gummed pilot jet and stuck needle jet. While your there check your air boot carb side for any cracks or damage.
Remove stator cover and yank the flywheel, could be way out if the woodruff key has sheared.
If that's solid check your back plate is in the correct position there should be a line stamped into the plate under the top screw make sure this is in line with the one on the engine.
If that's all good track your wiring your looking for any tape or any cut wires.
If all that looks good your bike should run.
Air
Fuel
Spark
Thats what I would check.