i have a pair of exr pro marzocchi forks.i've had them a while now i've cahnged the air pressure in them a few times and have had them at 50psi for agess and have given them some knocks but then took some air out and found the rebound had completely gone.what do i do. should i change the oil ort will that not help.

look on the marzocchi site there service manuals can be helpful (altough not always!)

wouldnt have thought theres a minimum pressure, would depend on the riders weight and style

I dunno the answer, but changing the air pressure will have an effect on the rebound anyway, so maybe you do just need to put some back in.

I had a pair of those about a year and a half ago. I did the same with mine, If you pump the air back up to suit your weight they will improve. Mine were 04's i think and the rebound was terrible on them even if they were adjusted to my weight, lots of people have felt the same as well, generally poor rebound. If there 05's they might be better i don't know, haven't used them

thanks for the advice. i'll try putting some more air in them.Then invest in some descent forks.