Possible FLOODING ?

Remove top of the carb, remove the float & shake it to detect any leakage; any fuel inside the float will cause a flooding condition... Next, with the carb top upside down adjust & measure the float adjustment... Next, using a hand brake bleeder pump, apply suction to the fuel inlet connection; replace the needle and seat assy if vacuum does not hold... Next, reassemble the carb and use electrical electronic cleaner spray on the carb main wiring harness connector... Do not use silicone or any other product on those wiring harness connectors as it will confuse the carburetor operation...

You should also recheck the 3 types of ignition timing as well (initial, vacuum, centrifugal)

GOOD LUCK