Pretty much straight forward, put on your thumb lever/box run your cable and attach it to the slides, just make sure you sinc. your slides (make sure they lift up a the exact same time). Of course you'll have to change your grips.
If you cluthch seems stiff or the cable is old or has any signs of wear go ahead and replace it.
I should also mention that the stock cable is differant than the cable w/o TORS, if the cable has a little ball on the end its the wrong one, it should have almost like a small sleeve slightly bigger that the cable wich hooks into the slide under a clip, when you pull yuor slides out youll seewhat I mean.
To adjust the slide hight, use the fitting and jam nut on the carb top.