The shock body should contain shock oil and should not have any bubbles in it. In the piggyback reservoir is a floating piston and nitrogen. When you compress the shock the oil goes past the compression needle (adjustment knob) and the piston compresses against the nitrogen.

Lack of nitrogen doesn't put enough pressure on the piston/oil and it may have caused your leak. There is an odd chance you may need to change an O ring seal. Most shocks you shouldn't hear the oil gurgle. That would mean you need to re-fill and bleed the oil and set the depth of the piston. Normally (with no spring) if you compress the shock the nitrogen pressure will push the rod back out on it's own.

Here is a video that shows how to rebuild a shock and you can see how they bleed the oil. See around the 8:22 mark. Fox shocks are done the same way.

 

I have a front shocks leaking on my 900 4. Both fronts in for rebuild next week.

 

Who did you have do the rebuilds? Mine are leaking from the caps too.

 

I blew off the oil leak and went riding finally today. What a mistake! It felt like some smashing a bat on my front end over every bump. Terrible day but I ran it anyways. Going to yank them off in the morning and ship them next week. What a pita!!!

 

Update?
Did you change the caps and repressurize before you went riding?

Fox shocks fix (oil leaking and loss of pressure) with...

long story short I have finally had time to do a tutorial on this issue with the Fox shocks found on our 900s RZR's. I'm sorry if this is long but I want to cover a few things to do while the RZR is apart too. there are a couple of symptoms that this will address: 1st: is the oil seeping out...

www.rzrforums.net

 

I did the caps myself, I used the Schmidty extended caps with valves and popped them back in. He has a how to video on youtuibe, its really easy. I cannot find nitrogen locally other than buying a whole tank so I just charged them with air to 150psi. As soon as I can get some Nitro, I will flush them and fill back up to 200 psi as he states in the instructions. Its been riding perfect.

 

Recently 3 of my shock caps started leaking.
I replaced all 4 shocks end caps with Schmidty extended caps/valves and pressured them to 200 PSI nitrogen.
Seem to be working fine now.

 

Recently 3 of my shock caps started leaking.

Not sure who thought filling what I consider fairly expensive shocks through a rubber plug was a good idea is beyond me. (I'd expect it on a football)