I have added up every part singally many a time, and also weighed my self and the bike about 5 times and took the average
I can save 500g's pretty easily by getting a Neon Ti bb and cranks, Rockman superlight rotors.
Other than that I'm not sure on how to save weight (possibly Dob forks), don't want to start modding stuff, drilling makes hardly any difference. Can't be bothered with Ti bolts and alloy spokes/nipples and all that shit.
So if I change the bb, cranks and rotors, it should weigh 8.1kg's. Oh and the chain is pretty heavy, but not sure if I want to risk getting a Monty one, saves 200g's though.
Any other light chains people can think of?