While I had my carbs out a couple of months ago I went ahead and replaced the upper hose. I figured that replacing that hose every 23.5 years or so can't hurt anything...
sure was easy with all that extra room! 
That's also my plan. I'm swapping stuff over from the Tourer to the Trike and the recently rebuilt carbs on the old bike are on the list. While it's all open I plan to change the t'stat to a hi-flow version of the oem unit, helps in warm weather and slow traffic...among other things. I also plan to replace the upper hose and debating about moving the temp gauge over as well, something I added years ago along with oil pressure and fuel gauge. With the I/S trike I won't need the fuel gauge but will leave that on the old bike since I'm swapping the tanks....also have an I/S tank on the old bike so the next owner will benefit from it with the gauge. Changing out the bottom hose is a bit of a pain, it's kind of a Y shaped thing that branches off to either side of the motor underneath. Not to be confused with the vertical hose that runs down the side of the radiator on the left with the chrome or SS coil cover.
