People are using the word 'vapor lock' when it's actually a vaccum being drawn in the gas tank from improper venting.
Ride the bike and when it starts acting up, quickly stop the bike pop the gas cap and see if that elevates the problems.
https://mymotorcycleblog.com/boom-va...-lock-no-fuel/
Or just due what we all do. Upgrade the carb and manually fix the venting problem.
https://mymotorcycleblog.com/boom-va...cc-grom-clone/
Tom