If you want to save weight on wheels, Samurider has these mag wheels which not only look great and are made for the bike, but they do save about 10 lbs of unsprung weight. I think that might be quite significant, and something I have considered for a while. It is the price that has kept me from doing the change...
They come in gold, black or silver as well:
https://www.samurider.com/?p=26675
Still, JPY 380'000 is like $3'500!!