Yes, the UCE bikes have gained a little weight, compared to the older models. My 2000 Bullet listed a curb weight of 360 lbs.....
I don't know the specifications of a 2000 Bullet. Is that an electric start 5-speed model? If not on either count then, strictly speaking, is that really a fair comparison to the new UCE model?
The current specs for a 500 Bullet Classic state 370 lbs
dry weight. If we consider the practices of motorcycle manufacturers in general in listing dry weights of models
before 2009 (things really changed with this years specs - pressure from the press finally have had a beneficial effect on the veracity of listed weight specs by the OEMs),
and take the extra weight of a 5-speed gearbox and electric start into account, we may find the 412 lb wet weight of current UCE bikes is better than we think.
I reiterate that I don't know the specifications for a 2000 Bullet. If that year/model bike
did have a 5 speed gearbox and electric start (and electronic ignition*), then I stand corrected.
*Electronic ignition systems - generally - add a little weight to a bike, all else being equal. The low and high RPM sending components of the EI stator along with the electronic ignition box itself outweight a points/reluctor system. The difference is very small though, and well worth it in my opinion.