so i did a full service to my cfz
and i found out oil on my air filter,
i opened the case and abit oil came from it and some on the filter,
he passed just 3.5k km , when i drained the oil from the engine there was 3.25liter maybe its happens cuz there was much oil ...
hope you will help me guys.
photo: https://ibb.co/iY9dxc

[2015 Z Force 800 53/Trail EPS]

First, just so you know, that is the stock factory paper filter. You are destroying your engine with it as it lets 15+ micron-sized particles get through which wears things out quickly..like rings..which makes it have blow by..which pushes oil and oil vapors up into the airbox...which sounds like the problem you are having. Start it with the cover off and let it warm up. If you see lite smoke coming out of the crankcase vent port on the cover, that what it is. If not, then  better check the pre-filter bag over the intake pipe. Its probably packed with sand and causing excess vacuum on the airbox..which also pulls more oil and vapors in from the crankcase through the vent tube.

Get the Unifilter or TwinAir foam filter we recommend and a good quality oil and cleaner for it.

I cringe when I see or hear people still using the factory filter. I have found 3-4 people on Facebook that I have told and they where still using it one guy even argued with me saying it was the other way around motors where getting dusted from people NOT using the factory filter 😫 I did my best to explain to him and send him here hope he came around.
But like nmk said get rid of the fact filter first thing throw it away asap.

what do you think about K&N filters ?
also can you sent me a link of TwinAir or Unifilter

[2015 Z Force 800 53/Trail EPS]

what do you think about K&N filters ?
also can you sent me a link of TwinAir or Unifilter

With one member loosing his engine because of a failed K&N we do not recommend them anymore.

https://goo.gl/images/AEGXHs

https://goo.gl/images/srwB8V

For all the 800s these are what we do recommend. Get them from where ever you want...or can:

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

https://www.amazon.com/Filter-2-stage-Straight-152mm-Length/dp/B001KO0ZBE/ref=pd_sbs_236_2?_encoding=UTF8&pd_rd_i=B001KO0ZBE&pd_rd_r=C8CCYVKBGF14KMN4941F&pd_rd_w=nXJBA&pd_rd_wg=P7AZm&psc=1&refRID=C8CCYVKBGF14KMN4941F&dpID=41MmdbaGyfL&preST=_SX300_QL70_&dpSrc=detail

this one is not better ? is much longer

[2015 Z Force 800 53/Trail EPS]

https://www.amazon.com/Filter-2-stage-Straight-152mm-Length/dp/B001KO0ZBE/ref=pd_sbs_236_2?_encoding=UTF8&pd_rd_i=B001KO0ZBE&pd_rd_r=C8CCYVKBGF14KMN4941F&pd_rd_w=nXJBA&pd_rd_wg=P7AZm&psc=1&refRID=C8CCYVKBGF14KMN4941F&dpID=41MmdbaGyfL&preST=_SX300_QL70_&dpSrc=detail

this one is not better ? is much longer

Just the photo they used. Look at the description- 6"s long. The straight one is 152mm which is 5.9". I'm sure the difference is in the angled rubber base. The angled one fits the box a little better too.

https://www.amazon.com/Twin-Air-156052FR-Resistant-Replacement/dp/B004S53IOI/ref=sr_1_1?ie=UTF8&qid=1462587877&sr=8-1&keywords=156052FR
Does this one fits for our 2015 CFMOTO ZFORCE 800 ? Twin Air 156052FR Backfire Resistant Replacement Air Filter

10 x 5.4 x 4.4 inches ITS not a big one ?

Another question what do you think about BMC air filter ?

[2015 Z Force 800 53/Trail EPS]

Never heard of a BMC air filter. Looks like a K&N and we don't recommend them anymore.

https://www.amazon.com/Twin-Air-156052FR-Resistant-Replacement/dp/B004S53IOI/ref=sr_1_1?ie=UTF8&qid=1462587877&sr=8-1&keywords=156052FR
Does this one fits for our 2015 CFMOTO ZFORCE 800 ? Twin Air 156052FR Backfire Resistant Replacement Air Filter

10 x 5.4 x 4.4 inches ITS not a big one ?

Is it fits ?

 I learned years ago in my years of drag racing that K&N is junk period. Ive  had them come apart and sucked in just from high vacuum of the superchargers . I've seen others have the material fail also on the K&N.......I have two new filters i bought .. a twin air and a UNI Hi Capacity 2-Stage .. Last year it was so dry and dusty that i figure i can just swap out the dirty one if needed on the trail..  I did this because the ones who run their machines hard and long some in environments  i may never see have recommend these filters.. ........Good info here from those that have been down the road on tried and proven products and i would listen to their recommendations,,,,,

[2015 Z Force 800 53/Trail EPS]

https://www.amazon.com/Twin-Air-156052FR-Resistant-Replacement/dp/B004S53IOI/ref=sr_1_1?ie=UTF8&qid=1462587877&sr=8-1&keywords=156052FR
Does this one fits for our 2015 CFMOTO ZFORCE 800 ? Twin Air 156052FR Backfire Resistant Replacement Air Filter

10 x 5.4 x 4.4 inches ITS not a big one ?

Is it fits ?

Yes it fits. I would not have recommended it if it didn't. The Unifilter is thicker and may provide better filtration in dustier climates. I run two, this TwinAir and one much larger Unifilter.