K&N Highflow Airfilter

[Hutch]

Just dropped about $50 on a K&N Highflow Airfilter. I noticed I was having some loss of power issues at altitude this past weekend, and thought if I gave my bike a little more breathing ability, it would help a little bit. Anyone else run with a K&N? Plan on installing it this afternoon. Will let everyone know if it was worth the $$.

[FZRguy]

Yes, worth it. I noticed a diff before I got to the end of the block.

[Quick636]

I didn't feel a whole lot when I put mine on. The bike felt a bit "different", but hard to say if it was any better or quicker.

I have actually read that on many bikes they will actually cause a HP loss.

[GixxStunna]

with the technology and the way filters are made now a K&N isn't gong to be a huge HP increase probably at he most 1 HP. Only reason I bought one was for the lifetime warranty.

[Ripper]

Well mate, any difference???

the K&N is supposed to flow 3x better than stock, the BMC filter is supposed to flow 5x better

[Anonymous]

I heard something about this recently, but I may have it backwards (I'm hoping somebody that knows will step in and confirm or correct me).

For carburated bikes, use K&N.

For fuel-injected bikes, use BMC.

BMC has too much airflow for carborated bikes, but the FI can adjust for it. At least that's what I think was said.

[Hutch]

Well mate, any difference???

the K&N is supposed to flow 3x better than stock, the BMC filter is supposed to flow 5x better

Don't know yet. When I started rippin' apart my bike, I noticed my rear tyre (that British for what you yanks refer to as a "tire" )was flat for no apparent reason. Sure, it has over 5,000 miles on it, and I can see the steel belts in one spot, but what the bloody hell is going on? Needless to say I had to stop and have some tea and contemplate my options. I have been tyre shopping ever since. So since I can't ride my bike anyway, I put off the air filter swap until my tyre comes in.

[Ripper]

Well mate, any difference???

the K&N is supposed to flow 3x better than stock, the BMC filter is supposed to flow 5x better

Don't know yet. When I started rippin' apart my bike, I noticed my rear tyre (that British for what you yanks refer to as a "tire" )was flat for no apparent reason. Sure, it has over 5,000 miles on it, and I can see the steel belts in one spot, but what the bloody hell is going on? Needless to say I had to stop and have some tea and contemplate my options. I have been tyre shopping ever since. So since I can't ride my bike anyway, I put off the air filter swap until my tyre comes in.

Blootie well,, than mate.

[Ripper]

I heard something about this recently, but I may have it backwards (I'm hoping somebody that knows will step in and confirm or correct me).

For carburated bikes, use K&N.

For fuel-injected bikes, use BMC.

BMC has too much airflow for carborated bikes, but the FI can adjust for it. At least that's what I think was said.

That makes sence, because it's a nightmare dialing in a carbed R6 w/ a BMC. but why would they sell them for carburated models?

[Quick636]

I heard something about this recently, but I may have it backwards (I'm hoping somebody that knows will step in and confirm or correct me).

For carburated bikes, use K&N.

For fuel-injected bikes, use BMC.

BMC has too much airflow for carborated bikes, but the FI can adjust for it. At least that's what I think was said.

That makes sence, because it's a nightmare dialing in a carbed R6 w/ a BMC. but why would they sell them for carburated models?

Because people buy them. Because most people assume more is better, when it very well be that more is too much.

[NineTwoFour]

The consensus I have seen on the R6 boards is that the aftermarket filters are WORSE than the stock filters. At least on this bike.

I put one on my 4-Runner, and it worked out great.

Probably just depends on the particular application.

[266]

I heard something about this recently, but I may have it backwards (I'm hoping somebody that knows will step in and confirm or correct me).

For carburated bikes, use K&N.

For fuel-injected bikes, use BMC.

BMC has too much airflow for carborated bikes, but the FI can adjust for it. At least that's what I think was said.

Not True. BMC filters require you to have to rejet your bike so you cant just "drop it in" like a K&N filter. That makes people think BMCs dont work when they just need to rejet. K&Ns are great when your stock filter is dirty and you need a new one. If you want a performance gain gat a BMC.

FI systems do self adjust to reach the "optimum" air/fuel ratio. The range they can adjust is small. When you add performance parts you can exceed the range the system can adjust trying to get the "optimum" ratio.

[266]

The consensus I have seen on the R6 boards is that the aftermarket filters are WORSE than the stock filters. At least on this bike.

I have heard the same thing. It only seems to be with the R6. The reason is the stock filter has more surface area than the aftermarket filters.

I have not had the chance to test this theory, yet.

[Anonymous]

The consensus I have seen on the R6 boards is that the aftermarket filters are WORSE than the stock filters. At least on this bike.

I put one on my 4-Runner, and it worked out great.

Probably just depends on the particular application.

Yep I use one in my 4runner as well, it works great; though I can show you some intake tricks that'll really make it go!

The other thing I have heard is that BMC's are great in Suzuki's while K&N's are not.

FWIW yes a K&N is "drop in power", especially at this altitude where your stock bike is still jetted for sea level. However if you rejet you're going to gain power no matter what.

[friscokidd]

Well mate, any difference???

the K&N is supposed to flow 3x better than stock, the BMC filter is supposed to flow 5x better

Don't know yet. When I started rippin' apart my bike, I noticed my rear tyre (that British for what you yanks refer to as a "tire" )was flat for no apparent reason. Sure, it has over 5,000 miles on it, and I can see the steel belts in one spot, but what the bloody hell is going on? Needless to say I had to stop and have some tea and contemplate my options. I have been tyre shopping ever since. So since I can't ride my bike anyway, I put off the air filter swap until my tyre comes in.

Blootie well,, than mate.

[Hutch]

Well mate, any difference???

the K&N is supposed to flow 3x better than stock, the BMC filter is supposed to flow 5x better

Don't know yet. When I started rippin' apart my bike, I noticed my rear tyre (that British for what you yanks refer to as a "tire" )was flat for no apparent reason. Sure, it has over 5,000 miles on it, and I can see the steel belts in one spot, but what the bloody hell is going on? Needless to say I had to stop and have some tea and contemplate my options. I have been tyre shopping ever since. So since I can't ride my bike anyway, I put off the air filter swap until my tyre comes in.

Blootie well,, than mate.

God bless you, Ripper!

[Hozerking]

There are a few bikes out there that don't respond well to aftermarket filters like the RC! On most bikes if you have an open exhaust a freeer breathing air filter will help.

I have the cone K/N on my Yamaha and without an airbox they sound awesome! Like I'm afraid for my family jewels when I open her up! you can reall hear her suck! ... this is good!

-al

[Ripper]

Hey Hozer you need any help puttin that batch back together, I gotta a shop up here!!!

[Anonymous]

Like I'm afraid for my family jewels when I open her up! you can reall hear her suck!

Yeah I knew a chick like that once too...

[Hozerking]

Hey Hozer you need any help puttin that batch back together, I gotta a shop up here!!!

I'm cool for now but the next time you have a get together give me a shout I'd like to see the place! Otherwise if I hit a snag I'm shouting! lol...

-al

[Ripper]

Will do!!!