I'd say change bb, giga pipes are heavy. Definitely tyres, also get rid of the echo urban rim (even if you switch to try-all double wall, it still weighs ~100g less, not even talking about single wall rims,so it's worth after all). I'd also say zoo parts are heavy, change bars at least (in my opion zoo bars are rubbish anyway). There are many areas where to can reduce weight of the bike, but that usually comes with high price. Good luck.