44T for your faired bike
45T for a Naked
Yes larger rear sprocket will increase acceleration & reduce top speed
Alternatively std front sprocket is 15T & the opposite smaller front sprocket will increase acceleration & reduce top speed - it will have 3 times the effect, or equivalent to going up 3t on the rear.
You can always do both, just watch out chain lenth, eg 14T front would have no effect
but 47T rear would need more links
HTH