sounds like the upper spring retainer(black plastic sleeve) is bound up. Spray some WD40 against the shock in between the retainer while having the RZR lifted with a jack. unless of course you adjusted the spring preload too much and then that is what will happen. Did you try to lift the RZR with preload?

 

I was wanting it to raise it a little seemed like back was sagging so the top spring is the preload? I'm a dummy when it comes to the shocks. I did have it jacked up when I cracked em down

 

When you tighten the spring using the 2 nuts up top your adding preload or compressing the spring. it does 2 things. Raises the machine and allows you to carry a little more weight. Downside is ride quality. To adjust them its best to jack the machine up to take the weight off the springs and adjust them about 1/4 inch at a time. the top spring is stiffer and the heavier spring on the bottom is for the "plush" ride kind of.

think of your feet and knees when you jump off something. your feet take the sudden shock (small spring)and your knees (large spring)slow you down while absorbing the weight. as you add preload the top spring compresses and gets harder of sorts.

the dampers on the shock allows fluid in the shock to flow slower or faster to soak up the shock of hitting something or bottoming out(g-out)in concert with the springs. on the 900s there is 24 total clicks. from the factory they should be in the middle at 12. clockwise stiffens the fluid transfer. adjust them in concert to spring adjustment to find the ride you like.

I have 1 inch preload in back and 1/2 in front on mine and have the shocks at 12 in front and 18 in rear carrying a heavy box. I ride mainly slower on rocky trails. I also took off my sway bar which allows the suspension to articulate better over rocks but you can get more body roll doing this. I don't mind it

 

I did some research some time back and came up with this: As a starting point, jack up the RZR, one end at a time. When the control arm and shock is fully extended, the springs should be almost loose but not quite. Make your adjustments from that point; carrying a lot of weight, you'll need to bump up the preload or buy heavy-duty springs from RacerTech or similar. You don't want to turn up the preload so far that the shock spends most of the time in the top 1/3 of its travel; I think (not sure) when loaded with cargo, fuel, pax, the shocks should be a little above 1/2 extension so topping out and bottoming out are minimized. Adjustments to the clickers can help with this too, especially as to preventing bottoming out. You don't need a Cadillac ride, but you don't want it to feel like the axles are bolted directly to the frame. Everyone is different.

 

Do you still have the stock setup? If so the light spring is on top and the heavy springs is on the bottom. The stock top spring does do much because it is to soft and the bottom is real heavy.

As for the pop? Is something loose? Maybe jack the bike up and make sure everything is tight?

The RacerTech springs are a huge improvement if you can swing them..

The stock springs have a lot of preload on them from the factory which is not a good thing, the less preload you can run the better the initial ride will be (in general). With The RacerTech springs I am running 1/4" front and 1/2" rear preload.

 

I was wanting it to raise it a little seemed like back was sagging so the top spring is the preload? I'm a dummy when it comes to the shocks. I did have it jacked up when I cracked em down

Stock Rzr shocks will all sag, unless you have fox, Elka or such you will have sag after about 500 km atleast thats what I have noticed