Sounds like you may have more than 1 issue with the carb. Has it been overhauled? Take the air cleaner off, pull the throttle open and closed and look down the primary throat for a shot of fuel that should be coming from the side of the venturi out of a small jet. No fuel = accelerator enrichment pump is dead. If you see a trickle of fuel that means it's blocked. What fuel are you using and are you using the factory recommended tune? The factory tune is garbage.