after sucking back a ton of dust and getting what looked like rubber erasers out of my nose for the past 3 days - I got thinking about my air intake and why i was running so hot on the trails. 

Once I took the housing apart I was able to see severe air restriction in the air breather.
Now I want to football kick my original air filter to the burn pile. 

I went to the dealership yesterday and they had no clue what I was talking about when I mentioned Unifilter and Twin Air filters.

In looking at posts on unifilter I cannot determine what unit I would need for teh 2015 800 Uforce?
when i type into the UNIfilter web site i cannot get CFMoto to show up.  is there another machine with the same OEM air filter diameters?
all knowledgeable assistance is greatly appreciated.
Earl

[2015 Z Force 800 53/Trail EPS]

All the U and Z 800s take the same air filters. All are either straight or angled...either will work, and have 2.25" flanges and either 5 or 6"s long. I crammed an 8" long one in mine..but that's just me.

These are what are commonly bought for the 800s.

https://www.amazon.com/Uni-2-Stage-Straight-Pod-Filter/dp/B001KO0ZBE

https://www.amazon.com/Uni-Angled-Two-Stage-Filter-UP-6229AST/dp/B000UKI2HS/ref=sr_1_2?ie=UTF8&qid=1462587268&sr=8-2&keywords=UP-6229AST

https://www.amazon.com/Twin-Air-156052FR-Resistant-Replacement/dp/B004S53IOI/ref=sr_1_1?ie=UTF8&qid=1462587877&sr=8-1&keywords=156052FR

If you want one like mine, you will need this one and adaptor rings from another that has them to get back to 2.25", shorten the internal cage slightly and adjust the airbox by removing a corner tang....at least I had to on the Z.

http://www.ebay.com/itm/Uni-Filter-UP-8300ST-Uni-Dual-Stage-Pod-Filter-Straight-3x5x8-/322390975251?epid=673554087&hash=item4b0fffe313:g:kT8AAOSw6DtYWaBy&vxp=mtr

Looks like this installed: