[FTMike]

I was wondering if anyone had experience with K&N air filters. Does it affect the throttle response and give you a small amount of hp? Does it allow too much dust and dirt into your intake? Any feedback is appreciated.

 

[misterclean59]

They are not good air filters for dusty conditions. The HP increase would be non existent on a 420.

 

[FTMike]

Okay thanks.

 

[alloutdoors]

I can't imagine you would feel a difference (in the seat/performance) with any air filter installed on a stock Honda ATV, but could be wrong....

 

[TBRider]

I've personally had good results with both K&N and Airaid washable filters, and I do plan on adding a K&N filter on my new quad soon, but I don't ride in extremely dusty conditions.

 

[Jeepwm69]

They are great for a track car, horrible for anything used offroad.

They will add zero power to any Honda ATV, and they will let fine dust into your motor, eventually ruining it.

They have their place, and it isn't offroad.

This same discussion goes on constantly on the Jeep boards. K&N are snake oil unless you have a built race car.

 

[wheeler]

If you are going to replace the stock filter, I would strongly consider either a Uni-Filter or Twin-Air as a good replacement. I've run both and they surely surpass a K&N on a quad...

 

[XplicitRacing6]

They are great for a track car, horrible for anything used offroad.

They will add zero power to any Honda ATV, and they will let fine dust into your motor, eventually ruining it.

They have their place, and it isn't offroad.

This same discussion goes on constantly on the Jeep boards. K&N are snake oil unless you have a built race car.

I'm not saying your wrong but I strongly disagree. I only run K&N Filters on my bikes, I have never had a problem with dust and dirt getting into the carb. To prove my point I have had my 1999 Honda 300ex for 12 years, NOT ONCE have I had to do a carb clean on that bike. All I do it clean the filter and shes good to go again. In the Summer months it is extremely dusty here too. Everyone has a different opinion on whats best, I'd thought I would throw mine in there

 

[_Wilson_]

I'd have to agree with the guys, K and N great for cars and trucks etc, but I'd be leery of using one on a atv, specially in dusty conditions, i have one on my xj jeep, toyota 22r etc, if i WAS going to use one on an atv, I'd OP for the K and N filter wrap, i use uni and belray foam oil (almost bullet proof) just my 2 pennies

 

[XplicitRacing6]

I just bought another K&N Filter for my new 400ex (Ironic lol) it came with that sleeve thing.

 

[Jeepwm69]

if you're adding a foam sleeve to the gauze, you're losing the "More HP!" aspect of the K&N. Without additional flow (which again, isn't really going to do much on a Honda utility 4wheeler) you're just paying 3x's the price for an air filter with no benefits.

I had one on one of my Jeeps years ago (Weber carb). It let very fine particulate dust into the intake, even though I cleaned it and oiled is as directed. Perhaps had I run a prefilter on it that wouldn't have happened, but again, if you're having to put a filter on your super flowing filter, what's the point?

I got no additional power from it, and it let dirt into my motor, so I junked it. I wasn't the only one with that experience in the Jeep community.

For a racing bike? No idea. Don't have any of those. For a stock utility bike? Waste of money.

 

[KBacon]

On my R1 sport bike I run BMC "Race Filter" and they are a superior filter to a K&N... I used to run K&N cone filters on my cold air intakes on my turbo AWD Talon... and then later on my YZF600R.. and the one on the YZF600R had a rubber like seam where you folded it over at a 90 degree angle and they would always split there... they would always replaced them under warranty.. I went through 3 of them before I went back the Yamaha OEM foam filter... and didn't lose any power at all.. and never again had an issue. That's prolly when I swore off of K&N filters... I use an Airraid in my truck...

 

[_Wilson_]

Thanks jeep, I'll have to re think keeping that k and n on my xj, i have seen where they claimed the k and n type filters better the dirtier it gets as long as it's kept oiled up......

 

[wheeler]

I run a Volant CAI on my Nissan Xterra & GMC Sierra. I swear by them... However on a quad or dirt bike, I would not run one...

 

[Jeepwm69]

Thanks jeep, I'll have to re think keeping that k and n on my xj, i have seen where they claimed the k and n type filters better the dirtier it gets as long as it's kept oiled up......

I believe that part is true.

We have some powdery dirt on one of the roads on the farm and if I went there with the Jeep it would look like talc in the throat of the carb