KN airfilter.

[Harlex]

I guess its been in a thread earlier but I cant find it....
Will I get any powerupgrade changing my oem air filter to a KN-filter.
My bike is stock with yoshimura tri oval without the quiet-baffle. I have an underderstanding that the effect is different between different modell and type of bikes but what about the/my GSX 1400?

[seth]

just for info
a k&n filter actually flows less air than a standard suzuki air filter proved on dyno tests a good few years ago.
k&n is a great filter as can be cleaned and re-used many times and that has many advantages but if you want max airflow use a standard airfilter
you exhaust will add a few bhp but there is a restrictor in the link pipe as well.
you can get a unrestricted aftermarket replacement but can't remember who makes them

[gsxbarmy]

Exactly as Stim says, K&N has the advantage of being able to be cleaned but will not give any improvement in power, the stock filter is actually slightly better.

[KiwiCol]

Exactly as Stim says, K&N has the advantage of being able to be cleaned but will not give any improvement in power, the stock filter is actually slightly better.

"Stim"?   There's a name we haven't see for a while.  Thought you'd lost him Dave?

[Harlex]

Thank you for answer. Case closed. I am not gonna buy KN-filter.

[Tony Nitrous]

K&N filters are OK but not great IMO.

In some independent tests they haven't scored that well.

Modern airbox's are normally well designed and flow fine. I don't see having better flow through the airbox with any filter a big deal when the 14 has small injector body's feeding the motor, more so if your running factory exhaust headers and collector.

Paper air filters for me. Drop old one in the bin, clean brand new one in the motor every time. Same for oil filters. Can't be arsed with the time, effort, chemicals etc to clean resusable air / oil filters for a very questionable gain.

[gsxbarmy]

Exactly as Stim says, K&N has the advantage of being able to be cleaned but will not give any improvement in power, the stock filter is actually slightly better.

"Stim"?   There's a name we haven't see for a while.  Thought you'd lost him Dave?

Where on earth did that come from? Jeez the heat today must have got to me........ (Sorry Seth)

[Endless]

So given that, does anyone know how the BMC hi flow air filter rates in comparison to standard? Been told they breath better than K&N.

[seth]

I've only ever seen the comparison between k&n and standard .
but as tony says it's really the airbox that makes the difference and fitting a new filter will be better than an old old.
i use hi-flow air filters on the standard bikes and don't notice anything different from using standard filters
i have pod filters on the tuned bike and even that made very little difference +1/2bhp .
so mext restriction is the throttle bodies .

[Endless]

Its a very good point regarding small injector bodies. I've stuck to the paper ones for same reason Tony has, they do the job well and its just easier with the swap over.

[rollerfish01]

My bike's last owner installed a BMC filter, recently I took it out for cleaning, here are some photos of the filter:

01.jpg : when the filter was used for 1K-2K KM (I guess/ when I bought the bike):
02.jpg : when used for around 6000 KM (some dust/dirt was there )
03.JPG & 04JPG: just clean up by using the cleaning kit and sprayed the regenerating fluid (not absorbed and not wiped the excessive yet)
05.jpg : ready to work

My experience is the cleaning process was quick and the re-oil process was easy, but needed to wait for the regenerating fluid to absorb (30mins the manual said, I waited for a day).
What I like is that I can clean it as frequently as I want, eg. per 5000KM with the motor oil change, also the cleaning kit was not expensive.
After installed back I can felt the difference immediately, although at most it should be as good as / near the new original paper filter (I have not tried that).
I thought if I clean it per 5000KM(or more frequently), it can keep it's peak performance and will out perform the paper filter after several thousand km. (Although I have no test on that  )

[KiwiCol]

I'm interested mate, what difference could you feel from the clean? 

Your filter looked pretty clean to me prior to cleaning anyway - could be just the pic though.

[rollerfish01]

I'm interested mate, what difference could you feel from the clean? 

Your filter looked pretty clean to me prior to cleaning anyway - could be just the pic though.

Hi KiwiCol, I think it's not magical but when using a clean filter the engine just response better to every throttle input and perform more lively.
However I heard that the original paper filter can provide better filtration than reusable filter in dusty condition.

[KiwiCol]

Ok, Thx for that.  My paper filter looks pretty clean, but maybe it's time I put a new one in.

[rollerfish01]

someone say this  :
http://www.motorcycleproject.com/text/powersports_air_filters.swf