Air vent in gas tank on 76 cb750

[The Terrible Mistake]

I'm a new rider , and know little. I am trying to figure out where the air gets into my gas tank. What the part is called and where it is located. I had some issues with my bike today and wasn't able to resolve them before i had to leave it.
The issue was that as I was accelerating my power would drop. until it finally stalled out. Well first thing i did before it stalled was tried the reserve tank, no change. i was pretty sure i had gas. when i stopped i checked the tank and there was gas. i tried turning it over it worked and i finished my trip to work. i ws only 2 blocks from work when i had the problem.
At the end of the day i went to fire the bike up and it started but would not keep running. i show the same problem as i had before. This time i did not open the tank and try again. I had to leave hurriedly so i caught a ride with someone and went about with what i had to take care of.

Afterward i spoke with my mechanic and he and i discussed the issue and we came to the conclusion that the problem might be with a clog in the intake to the gas tank.

any clues?

[Re-run]

The air vent is in the gas cap. If you look carefully at the cap, you should see a small hole. I have never had to clean one yet but a couple shots of carb cleaner might do it.

[CB750 Winger]

   I think you should remove the fuel petcock (shutoff) and clean it good. There is a screen in the bowl, or should be but you may have a buildup of crud on top of the fuel valve just letting enough fuel through to run for a few minutes. Drain and remove the tank and try that. Also run a small wire through the gas cap vent on the bottom side of the cap, you'll see it.      Paul

[GreenerGatsu]

did any of these suggestions help you?... I am having similar issues.