ive just done the 600 shock conversion and was wondering how i lengthen the shock its self, at the bottom near the swingarm it has a turning mechanism with numbers 1-7 on it, the notches on the turning mech get closer the swingarm abit like steps - 1 being the lowest. do i need a special tool do this or is there a technique?
thanks for any help
i'll try to get pics up tomorrow as i know it always helps.

C spanner or if your rough, hammer and drift.