Moto 4 no start issue
 

I’ve been wrenching on this 89 moto4 350 for over two months now, changed everything from new spark plug and ignition coil, new battery, new wiring harness, new solenoid, new carb, everything. I’m not getting any lights on key turn but if I pull the pull starter or jump the new solenoid the reverse light flashes briefly and the spark plug sparks strong. I’ve tried starter fluid in the carb down the plug hole still nothing. Adjusted the valves and timing everything checks out. What the heck am I missing??