I’m up for new chain sprockets & looking at making the most of what my bike does.
It’s a 1997 748 Bi-Posto, standard all ‘round except for Terminigonini cans & chipped to suit. Has 40,000kms on the clock. Currently has standard final drive of 14t front, 38t rear. (525pitch).
I ride mostly weekends/group rides/twisties & trackdays. No real commuting, or two/up.

On the safe side I was looking at going just a little shorter in the final drive (from 14t/38t) to 14t front, 39t rear, looking at getting that extra drive between the gear changes etc. I’ve heard of 14t/40t or 14t/41t, but this seems to be with a lot of track-focussed mounts. Just wondering what your opinion would be on this type of change?

Not sure if these figures for a 748 means anything:
Final ratio: RPM @ speed:
14/38 5336rpm 120kms/hr
14/39 5476rpm 120kms/hr
14/40 5617rpm 120kms/hr

Thanks !