You will get a small boost in acceleration. Personally If I was giung to do it, I would go a bit bigger, 30 to 35 amps. Just keep a track of the various temps, motor, wiring etc.
I moded my suposed 22 amp. (actually only putting out 18 max) to 28 and man what a difference, like a totally different bike with more power than I will out grow for some time. Highly recommend.