Blue Light Special
Join Date: Sep 2006
Location: Bay Area, Sunny Cali
Bikes: '05 Felt F55, Schwinn Prologue road bike, '86 Centurion DS Iron Man, Sette Flite AM MTB
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Marzocchi's site is very comprehensive with pictures and manuals for all of their forks back to 2001, even OEM forks. So check their website first.
I have an older Marzocchi DJ fork (don't know year or specific model 1/2/3, so I haven't had luck finding the manual), but it has two Schrader air inlets at the top of each leg. It does not have much travel, usually 60-80mm. The air pressure adjusts the stiffness, and also kind of adjusts the preload (the fork sags more, the less air is put into it, and also it is easier to compress). The rebound seems to be set by the oil weight. I've tried putting a different pressure in one leg vs the other, but it doesn't seem to do much and anyway I think it's bad because each leg effectively has a different weight spring in it.