On the ST11 I would do the springs and the gold valve emulator on the anti dive side of the bike (it has a damper rod). I did replace the shims in the other side (it has a damper cartridge) but they looked little different to what was in there, so no point wasting the money. The emulator lets the front forks go through their full range without hardening up (which the damper rod does). Rides much better on rougher roads.