Blew both my rear shocks yesterday, '21 800xc.  Seeing posts about our shocks doesn't give me the warm and fuzzies.  I expect the shocks will be replaced under warranty but I'd really like to start making them better for me.  Does anyone have a great suspension shop that is good with the stuff on our ATV's?  Next, if I had the money I'd upgrade to elka, but I do not.  I spent hours looking online for info today and virtually nothing is out there for info....are there shocks from any other manufacturers machine that fit??  Anyone have the exact specs for our shocks?  I measured it at 21 1/8" extended...but have seen at least 2 others claim to be 22" extended...what is the compressed length?  Spring rate? Etc...?

[2015 Z Force 800 53/Trail EPS]

I'm not sure anyone here will have all those specs on the Xc shocks...however you do. Just have to remove one front and one rear, remove the spring and measure center of the "Is" extended and compressed, "I" diameter and width. Then you can get the spring length uncompressed, it's inside and outside diameters and it's wire size. The rates will be tough without some compression equipment though.

I know both Bandit and Elka would be happy to custom build a set for you however like you said...that won't be cheap. However if you ride a lot...and hard, it may well be worth it. 

I just got a quote from Hester's on stage 1 Elka's. $1,356.00 set of 4. Stage 2 $1,736.00 set of 4.