My bike is very heavy. 4/19/03 was the 1st time I weighted it. It was accomplished at the Kiev airport. And the bike turned out to be 15.2±.2 kg.
That was before major upgrade (only handlebar ends ("horns"), frame bag and flask holder were installed as additional equipment)

Now it is being upgraded (by Oleg Piskun) - the following items will be replaced, but the resulting weight is expected to change by not more than 1 kilo (and it is not yet clear to which direction:)

Still, I don't care to worry to carry additional 3 kilos (or whatever might be saved by investing additional $1K or so)
I believe that regular chain replacement is much more beneficial compared to spending money for lighter weighing bike in the light of riding efficiency:)