I have some Marzocchi 66 RCV 180mm travel, im just after some advise from any previous owners or anyone who knows anything about them.

Forks seem fine however when moving very slightly it feels like theres a small knocking ( as of the headset is tightened up properly but in this case it is – and i only notice it when i do a similar action to checking for play in headset by holding front brake and rocking back and forth), is this common with this fork or is it just the way it is?