Carburetor question please

[Iswing]

Thank you all who have helped me through my restoration projects.  I removed the carburetors due to gas leaking on the engine.  First time they were taken out of the bike (14K miles) and everything looked pretty darn good.  Replaced float needles, and cleaned all the jets.  Put it all back together and gas poured out like gasoline falls.  Turned out gas tee inlet was leaking.  Took carburetors out again, and replaced o-rings on inlet tee and put it all back together.  No gas leak and runs fine BUT there is like a flutter right as you start to give it some gas, then all is fine.  No matter the speed, a little flutter before taking off.  Ideas?

[Chrisj CMA]

Maybe a carb sync might clear that up

[Jims99]

+1  I agree with Chris.