You do not need to replace the clutch line for two inch risers, some careful re-bending along the top frame tube will get you enough slack to make it work, same with the throttle cables, just do a little re-routing. The enrichener and brake lines do have to be replaced, IIRC. This is ASSuming, of course, that you are not putting ape hanger bars on.
I'm replacing the clutch line for a braided HEL one and already have the risers fitted.
My stock clutch line with the risers is tight (ish) at the bar end but this is because my clutch lever is adjusted to a level where it's comfortable. If I tip my lever forward, I get more slack but then not comfortable for clutch hand.
I'm using the stock choke cable with my risers, just don't run it through the guide on the headstock.