I've been doing a little research, and I think this kit for A/C 700 HDX will work on the Zforce 800.
https://youtu.be/na8Bq-8AW_0

[2015 Z Force 800 53/Trail EPS]

Go for it...keep us updated. Amazing, they look to use the same clutches. I do think the sliders work better then the rollers though.

First of great find I reached out to epi and spoke with Josh one of the tech support guys I asked him if he had herd of anyone using there kits on cfmoto he had not but was happy to compare parts if he could get a cut sheet or the parts to compare so then I called cvtech to see if I could put this together and that's where it fell apart cvtech has cut sheets of the dimensions of the parts for the 500 but could not probuce them for the 800 which I thought was odd. But owell he told me they may be able to find them but it would have to be his co-worker to do so and to call back later when he was in. He also said call cfmoto they may have them so I did I talked to a guy forget his name but anyway he explained he can't produce those docs if he could he would. I also asked if they could reach out to epi and they said normally it's the other way around when it comes to the aftermarket making parts for the machine they reach out to cfmoto. So all and all I was not able to confirm they would. But Josh from epi said if the could get a machine they would love to make parts for it also said they make belts that could possibly work for it he would just need the dimensions to compare. He also said to try it and if it works great if not return it and the only loss is shipping. So I think I'm gonna it his thought was the part number sz12 helix spring at $24 dollars and the we490424 wet clutch springs would be the best place to start those where 49.95 he said keep the same weight as factory for start cause the motos hp and rpm are much higher than the artic cat is and this kit was made for it's hp and rpm.
I know it's not easy but it would be sweet to see cfmoto give epi a utv to develop on cause they make a lot of aftermarket parts for all the other big brands so why not cfm......

If you get me a contact I will talk to them about running it in my race buggy.  Or just a phone number or whatever.  Im willing to test and beat on things LOL

I spoke with Josh I asked if he had a direct # he don't but the number I called was 218-829-6036 and asked to speak with tech support. Yeah it would be nice if they would send the parts to try and if they fit that would be awesome.  Good luck fyi I told him if I had any luck getting the cut sheets from cfm I would call him back I'm gonna give cvtech a couple days and call back to try and get that info but it don't hurt to try them anyway lol

Justin not Josh he sent me a email about it had to check it lol I'm bad with names.

Too bad I only have a Z6EX.  I'm only about 3 hours from them and I would let them test on my rig!

The z6 and Z8 use the same clutches. The Z6 makes a lot less HP so keep that in mind