I spent a couple of hours last night updating my new satin silver S-750X. I swapped out the dying front hub battery with the NOS (new old stock) battery I picked up a few months ago. It runs great! I also swapped out the matching rear motor so that the wheels match. I know, I know but I like it to look consistent. I also cleaned up a lot of fine dirt from the bike. It was probably sitting for many months in a dusty environment. It looks much better now! Although you may not notice a huge difference unless you look closely.