750 aed stumble off idle/start

On most carbs, the jet size has almost nothing to do with a tip-in hesitation or even a part-throttle bog.
And if your jet sizes get to be bigger than they need to be, you will wash the oil off the cylinder walls(in addition to losing power). This will lead to accelerated ring and bore wear, and the gas in the oil won't help the cam and bearings one bit.
So yeah, get the timing worked out first. Then the jet sizes.Then the PV timing. Then dial in the pump system.And lastly the Vcan.
To make things easy for myself, I often defeat the secondaries, and dial in the primary jets all by their lonesome.