I do most of my lane splitting when traffic is stationary @alejandro and although the SH23 cases are narrower than the stock bars, their width is lower down the bike. Consequently I only go for big gaps, like at traffic lights, when I have the cases mounted.
Without the cases, I don’t find the stock bars any limitation at all, as the bike is taller than most cars so the bars fit nicely over car wing mirrors. But again, I do most of the narrow stuff with stopped vehicles in case anyone decides to lane change.