Post carb rebuild power loss

Hi all,

I’ve rebuilt my carb and am having problems with power loss
When I am out testing it or even in the driveway and push the throttle past a certain point, it starts to bog down. Doesn’t die, just bogs down. If I feather it at the zone before it starts to bog down, it will slowly speed up, but I can’t get it to go much more than 30.

Interestingly, if I am running it and it is bogging down, and then turn the fuel knob to "OFF", after a few seconds it will rev up and start accelerating like it used to. Seems like it is getting too much fuel and then when it starts running out of fuel, it starts to accelerate again.

Thoughts? Float is adjusted wrong possibly?

The frustrating thing is that twice now after reassembling, the bike rode and accelerated perfectly the night I reassembled it. Then, after sitting overnight, or for a day or two, and trying it again, it returned to the bog-down problem.

I rebuilt the carb with new needles, jets, etc. I didn’t mess with the air-mix adjustment and didn’t use that part.

I’ve checked about everything else on other similar threads like checking the diaphragm, check hoses for air leaks, etc.

I posted this in an old thread, so apologies in advance if it’s bad form to put into a new thread.