On SE models with the hydro clutch I have never had to change it. cable clutch +2
Brake lines always +2",
Throttle and Idle I have always (and i personally have done dozens) changed to +2 or +3 cables and retained the factory routing.
The throttle/idle cables do seem to the odd man out. Some do and some don't. Brake line is always changed. Clutch line is always fine.
The red bike maintained the factory routing with the stock throttle and idle cables. Later changed the throttle body as part of the top end work and new throttle body had bellcrank slightly more outboard. Throttle/idle cables no longer reached using OE routing. That subtle of a difference was all it took.
I've only changed those bars on a small number of buddies bikes. That I can remember now two lived with OE routing and one had to move the cables to the same hole as the handlebars to reach. With that they reached fine and he was unwilling to buy a set of cables just to keep them through the original hole in the fairing.
They're great bars though. Well worth a pair of cables if that's what needed to get them installed.