I have a ZX14R with 11,000 miles now, original air filter. Is it time to replace? And where is it? Does the fairing need to come apart?

You need access to the left frame area. I'm not sure if you have to take off the fairing panel on the Gen 2 . On my Gen 1, I take off the foreman grill on the left side and the front tank cover. You'll see the access door held with 2 bolts.

Mad

Yeah I would bet it's high time to change it. 8000 is about the max I would suggest waiting in the future unless you live in an extraordinarily clean environment. 6000 is about the right time for me to change.

I changed my G2 at 7500 and it was fcuking dirty and where I ride aint no dirt. Ram air seems to work good ramming bugs and crap to the air filter and CA don't have bugs either because we live in a fcukin desert (most years)

OEM can be had for around 35 +/- online or around 60 +/- local dealer.

I pull mine out, blow it out with compressed air, mild soap wash and dry in the sun and reuse.

Looks like new.

* Last updated by: piken on 5/13/2019 @ 3:21 PM *

No oil on the foam? I've been using K&N and BMC for years.

I'd only wash a reusable one that is designed to be washed and reused.

I feel best replacing an OEM filter. Break off the tabs and remove the steel plate and it will be lighter than a BMC and the difference in flow compared to a race filter will be negligible. Actually I was told by a tuner the difference in AFR with or without a race filter is already negligible,

https://www.youtube.com/watch?v=4sxEpgJ3i50

That's a negatory on the fiber washing. Pressure pushes the microns deeper into the fibers, then pass out the other side scoring the cylinder wall, skirts, etc. Best move is to replace with a new element. I sacrifice the ram-effect for engine longevity. I want the most compression made, not leaking down score lines, we add up the scores and find a combined leak down the side of the cylinder kind of lost compression.

I'm not saying to never replace a air filter, but....

A cleaned and reused paper filter "is better" then a dirty paper filter, period.

A dirty filter will increase vacuum pressure and draw more/larger particles through the filter.

What is the filtering efficiency of a new paper filter vs a cleaned and reused paper filter?

What is the filtering efficiency of a cleaned paper filter vs a K&N filter which has
lower filtering efficiency then a paper filter to start with.

Engine longevity and lost compression from using a cleaned paper filter is
a little over dramatized. How many 10's of thousands of miles and years it
would take to show any more wear one over the other, would be a lot if ever due
to other things that will effect engine wear/longevity and lost compression.

I do have a vehicle bought new 17 years ago, 175k miles and has never had a new air filter, but then
I've never done a leak down test on it either.

But, yes, you should always replace the air filter with high quality paper filter for
best filtration efficiency.

* Last updated by: piken on 5/14/2019 @ 10:35 AM *

https://www.youtube.com/watch?v=4sxEpgJ3i50

Do you think I need to change my air filter, or could I get one more season out of it?

How many miles is that?

The filter was new when I left home in Vancouver BC. 3 weeks and 9500kms later, Alaska and back with lots of riding in the dirt due to road works.

Good thing you checked it. Good thing you had an OEM in there too.

1) Anyone has link to a video, where is this air filter located and how to get to it ?
2) Anyone has a PDF of the 2017, 2018, 2019, .. performance sport ZX14R service book ?
Thanks

1) Left side [sitting on bike], follow the ram tunnel, air cleaner is above the rubber ram boot going into the frame. Reference point is watch my video above.
2) Not that I'm aware of. Bueller?

I'm sure its like the Gen1, you have to remove the fuel tank cover and there on the LH side is the door to the air filter fastened down with a couple screws. The filter pulls straight out to the left.