One of the air preload valves on my 2006 170mm 66rc2x is stuck open. When I cycle the fork, I can hear air wheeze out through the valve. I've had to double the air preload on the other side to get the correct amount if sag.
I tried a few drops of oil and a a few pokes, but it still sticks open.
Can this be replaced with a stanadard schraeder valve stem core somehow, or am I destined to call Marzocchi customer service?