I am no expert but here is my experience though it is not on the TW. I have a 1986 (YX600). The forks were really spongy, worse than the TW. I would go around a corner and couldn't hold a line. I ordered a pair of FZ600 forks which had factory emulators. My fork tubes ended up being in better shape so I Frankensteined them. I ended up with the emulators and FZ springs in the radian forks. I can now pick a line through a corner and hold it. I can change position in a corner and have complete control. I have no idea how to adjust them. Mine have to come out of the forks for adjustment. They are still set as I got them. Listen to others about TW results before making up your mind. I think I need the rear spring like you got, mine seems awful soft.