Hi and Welcome!
Hey, I used to live right next to Glen Annie Golf Club in Goleta while at university! Then moved downtown S.B. after graduation!
Your carbs are not "clean"! As in factory-fresh clean. Bike ran perfectly fine when it left factory in brand-new condition, and there's no reason it shouldn't if carbs are as clean as they were when leaving factory. Fact that bike doesn't run as brand-new shows that carbs are not "factory-clean". Here's some related threads that will help you.
This post summaries it:
https://www.ninjette.org/forums/show...10&postcount=8
https://www.ninjette.org/forums/showthread.php?t=323452
https://www.ninjette.org/forums/showthread.php?t=322846
https://www.ninjette.org/forums/showthread.php?t=321223
https://www.ninjette.org/forums/showthread.php?t=315193
https://www.ninjette.org/forums/showthread.php?t=317977
Also search for "carb refurb ducatiman". Years ago, I spent 2-months, over 40-hrs trying to clean my 2003 pregen carbs with spray cleaners, poking it with various size wires, ultrasonic cleaner for weeks on end. It behaved exactly same as yours. Compared to 2nd 2002 pregen I had which ran
perfectly. It started with minimal choke, warmed up within 30-sec, pulled strongly under partial or full-throttle from 2000rpms+ and positively
screamed to 14k-rpm readline.
As troubleshooting step, I swapped carbs from better-behaved 2002 pregen to troublesome 2003. It ran
perfectly and I realized my "carb-cleaning" was insufficient. Only difference was carbs and my attempts at cleaning the 2003 bike was not restoring it to factory-clean fresh condition.
After searching on here, I sent troublesome 2003 carbs to ducatiman for real refurb job, even got new seals, bolts and hoses along with thorough internal cleaning of all jets and fuel-passages. Put refurbed carbs back on 2003 bike and it ran
perfectly like brand-new bike!!!
Since then, I've acquired toxic cleaners for ultrasonic machine along with high-pressure soda-blasting equipment. Even then, yearly carb-cleaning on my 2008 race-bike is not something I look forward to. It takes good 30-hrs to do properly and I don't enjoy it one bit. If you didn't floss out all fuel passages, along with ultrasonic agitation in chlorinated cleaners followed by high-pressure soda-blasting, your carbs are
not factory-clean. Therefore, are not behaving as brand-new factory-fresh machine off showroom floor. There
IS a way to achieve that level of performance...