There is no magic formula, but you need to go up on both circuits at least one size, and then up in increments of one at a time on each circuit separately until you get there, also you may have to raise or lower or even shim the jet needless, everything else such as valve lash, ignition timing, cam chain adjustment need to be correct also, all this needs to be done if you are going to do the job properly.
Thinking it would defently be too lean with the jets you have and mine with different carbs 24s and 29mm smooth bores and playing with the jetting never seemed to run quite as good as with the baffle in. Too Easy to piss off the cops and folks in your area too.
1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket....