Just do it! Zero issues and perfect street gearing! (also perfect for my local track) Mine is a 2024 V2 Bayliss.... (same gearing as standard version from factory). I went to a 45T as this ratio is within the accepted Ducati range for trouble free QS operation and less of a change than dropping a tooth on the front. I brought a new chain as the standard chain length length is too short to accept +2 on the rear. Sure you can just but some master links and and inner but I prefer the 1 link join over the multiple link join. A note on this..... you must lengthen the chain....... 45th sprocket on a standard chain will happily grind a hole in your swing arm so be warned and do so by the two options above.
I brought mine from CFMOTO without any issues. I received the sprocket in about 4 days Italy to Western Australia. I cannot get parts that quickly (free freight) from Eastern Australian suppliers!!!!) outstanding service and unmatched delivery speed. Look em up on the internet.
How did it go?
Pulled Standard off, put 45 on ensuring eccentric chain adjuster was reset to allow for adjustment, MADE SURE sprocket was not contacting swing arm after fine tuning chain tension before tightening rear axle up. (saw a guy pumping 240nm into an axle nut on YT with the sprocket clearly touching the swing arm lol. hilarious).
Kicked the old V2 in the guts and rode away to do a speed/gearing calibration via the dash option already noting that QS already felt fine. Did the calibration and Boom!.... absolute crispy trouble free QS operation and the absolute pain in the bum tall gearing frustration has melted away.
Highly reccomend + 2... just do it.