fuel needs to sucked in the crankcase to reach the cylinders . can you feel good or some suction on the carb throath …
if not the venturi effect on the LS and HS section of the carb can’t vaporize the fuel . did you blow all orifices with carb cleaner and air dry
did you clear the lower HS jet with a small wire or monofilament
crankcase suction vacum can be lost due to leaky crank seals
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