MX Pro air pressure

DTM12

I have a set of new Marzocchi MX pro forks on my trek, it seems when I have set them up I need to run lower than the recommended air pressure to get 20-25% sag. The book says 30-40 psi for lightweight riders (i am 64kgs) and I have had to go to 25psi to get anything like that. IS it ok to run them that low to achieve the sag ?
The trouble is when I do run them at 25psi they fell a little too plush for the first half of the travel and then ramp up hard for the last half. I tend to use half of the travel when climbing out of the saddle with my weight forward, but then I can only just get full travel from them on big hits (minus about 5-10mm) .

However if I run them on higher pressure then I get too little sag and I cant get anything like full travel from them, Is my set up flawed, or is it the norm for this fork ? DOnt get my wrong they are a lot better than the garbage forks I used to have but just wondered if my set up is wrong.

russ0228

marzocchi forks are famous for taking an absolute age to bed in. intil then your fork will fell well,,, wrong but after a few good rides they should fell just as you would want them to. pump the fork up to the correct sag and get out and ride they will bed in.

DTM12

OK, so you are saying that after the bed in period I will probably get more sag coz the fork will get freer movement, trouble is will I doubt I will get full travel if I run them at 30 psi plus as recommended, or will this increase in time as well ?

russ0228

yeah pretty much. as they breqak in you feel you will need to add more air to compensate. evryone asks the same question when they buy new bombers. "you are not alone"

nicklouse

the sag should be set with the rider in the normal riding position. body forward and over the front.

stevieboy

I have these forks too, probably done about 250 miles on them (approx 18 hrs) and they are only just in a state where I would say they are bedded in.

I also run the forks slightly softer than the recommended to acheive the correct sag, more than likely due to my riding position.

jayson

Zocchi's do take an age to bed in fully so generally u just run them at a lower pressure until they feel like they're moving more than they should then increase the pressure gradually by a couple of PSI at a time.

stepdot

I contacted the importers on the same matter and was told that it is fine to run them with no air in them at all if that is what you need to get the required sag. I needed around 10psi in mine, I am around 68kg if that helps.

RIKO

Yeah the instructions do seem to overstate the air pressure require I have some 2003 MX Comps at the minute (well bedded in) and I only run them at about 20PSI im about 95Kg

Tony06

when setting the sag does the compression damping have an impact?