Hello from MN.  Long time ATV riders here.  Just sold a Massimo UTV and purchased a zforce 800 about an hour ago..  Now we have to sit and think about it since we can't pick it up until Monday..waiting impatiently for that first rip

[2015 Z Force 800 53/Trail EPS]

Welcome. Make sure it has the updated or Unifilter air filter on it.

Yes, and even with the later better CF Moto foam air filter it might be a good idea to clean and re-oil it with good quality tacky foam air filter oil, than to just trust that the factory did it right.
It's a special oil that is actually super sticky stuff that is thinned with a very volatile suspension agent that makes it act like regular thin oil but when exposed to air the volatile agent evaporates away, leaving your filter with a thin coat of the super sticky, distributed throughout the foam.

I suspect that someone putting my CF Moto 800 into service at the factory might have used regular motor oil or at least not very good foam filter oil on my CF's air filter, and what happens in this case is that plain oil responds to gravity and settles on the low part of the filter, leaving the upper part dry and more prone to allow dust to get past. The first time I opened my air box, what we see in the photo is what I saw. Oily low part, dry upper part. Proper foam filter oil leaves a stickyness that stays where it was put.



For gosh sakes don't use K&N oil, that's just sewing machine oil with purple dye, and is useless in a foam filter.

Proper foam filter oil is really weird stuff, wear neoprene gloves when you handle it. When you wet the filter and pull your hand away there's a million spider web fine filaments of oil/product stringing through the air. Then you know you have the right stuff.

ps. Love my CF Moto, had it to do over I'd buy it again.

Those factory filters don't use oil in the foam as far as I know, but some have reported oil getting into the box from the engine.

My filter had no oil on it before I swapped it out.

[2015 Z Force 800 53/Trail EPS]

Those factory filters don't use oil in the foam as far as I know, but some have reported oil getting into the box from the engine.

My filter had no oil on it before I swapped it out.

Right. That's a prefilter over the pleated paper. Oiling that would soak into the paper and...that wouldn't be good for airflow.. Although Glevlivet's looks thicker then I remember them being so it must be the CFM foam filter.

Those factory filters don't use oil in the foam as far as I know, but some have reported oil getting into the box from the engine.

My filter had no oil on it before I swapped it out.

Right. That's a prefilter over the pleated paper. Oiling that would soak into the paper and...that wouldn't be good for airflow.. Although Glevlivet's looks thicker then I remember them being so it must be the CFM foam filter.

Yeah, for whatever step in evolution it represents, my '17 Trail had a 2 stage filter stock, all foam like a Uni sort of though tapered. This is it cleaned up after the first adventure. Then I oiled it with good foam filter il and next check it was proportionately dirty and the intake had no new dust evidence. Even so there's a Uni on there now. Just because. 

It was definitely not foam over paper, it actually looked like a good 2 stage foam filter and with the taper probably had a few more Sq Inches area than an equivalent cylindrical Uni. but wetted with shit oil, obviously.