[SurvivorGuy]

Hello FJR enthusiasts.

So, my 07 is new to me and I am currently working through serving what I do not know. I had no idea when the last air filter service was completed so I ordered a high-flow.

I just pulled out the existing filter and it appears to be a K&N, definitely dirty, and needs cleaning and oiling.

Any feedback and input on which filter would be best is appreciated.

The high-flow cost $27 shipped on eBay so shelving it is no concern, my concern is what is best for the machine..

Clean the K&N or install the High-flow?

Thanks.

 

[Oldjeep]

Hi Flow. Take that K&N dirt passing filter and toss it.
K&N gets "superior" flow characteristics by filtering worse and letting bigger junk through, up until the point it clogs.

 

[SurvivorGuy]

Hi Flow. Take that K&N dirt passing filter and toss it.
K&N gets "superior" flow characteristics by filtering worse and letting bigger junk through, up until the point it clogs.

Hi Oldjeep. I really appreciate your advice and quick response. On my way back into the garage to complete the service..

Old Jeeps are the best! Had a few 70's Town & Country. Wish I had kept one or two..

Thanks again!

 

[Oldjeep]

70's - that isn't an old jeep (Yeah, OK - I added a couple feet to the middle and installed some 1 ton truck parts)

 

[SurvivorGuy]

70's - that isn't an old jeep (Yeah, OK - I added a couple feet to the middle and installed some 1 ton truck parts)
View attachment 85302

Reminds me of Bubba Bacon. Check out these Videos, Bubba Bacon is the only one that day to make over the water falls.

 

[Oldjeep]

this one was my wheelie machine, but nothing like those monster tube buggies.

 

[Al Barth]

And while you're at it... form a 'cover' using metal screen for the intake snorkel to keep them pesky rodents from building a home inside the airbox

Sent from my moto g power using Tapatalk

 

[RaYzerman]

I had the same thoughts about K&N's until two new-to-me bikes came to me with them.... on my VFR it was very dirty and neglected. On the interior airbox side, it was clean and no evidence of letting any dust through. I'm now OK with K&N's... they are cotton with a mesh on the intake side, which you soak with just the right amount of oil. Seems quite fine to me.
Dirt bikes have foam filters you also treat with oil.... now those, I don't know, but if you service them regularly, I don't see too much of a problem.
Paper is OK too, but what we really need is a scientific comparison to see who allows what through....... anything is bad if you neglect it.
Nothing wrong with Hi-Flo's.

 

[Oldjeep]

There are lots of scientific comparisons showing how bad they suck at filtering. Once I get to a computer I will Google one for you.

ScienceDirect.com | Science, health and medical journals, full text articles and books.

www.sciencedirect.com

 

[StreamRider]

How often should you treat the FJR filter with oil?
To be honest I have done 100's of "dirtbike" filters but have never heard of oiling any other ones except Harley cone style that sit out in the open. I recently inspected mine and the entire box/filter was clean but I didn't re-oil it or do anything special except blowing it out the usual way.

 

[Whooshka]

With a K&N generally when it looks dirty clean it and oil it. Pretty simple. How often depends on how dirty the air is where you ride. I'll do mine right after pollen season in the spring and again in the fall.

 

[Aroxx]

I use K&N. I even have a K&N for my house. Because horsepower.

 

[ReRose]

K&N furnace filters will let the blower fan turn another 1200 rpm because it lets the air flow.

The original K&N furnace filter let the squirrel cage bearings burn up due to excessive spinning so K&N had to detune the filter where the free spin was limited to 1200 rpm so the bearings survived .....

True Story .....

 

[RaYzerman]

Well after reading all that, I'll keep the K&N no problem. I clean and re-oil once a year. Cheaper than OEM in the long run too.
According to Yammy, you're supposed to clean your OEM air filter with compressed air every 4000 miles, replace as necessary.

 

[Oldjeep]

Well after reading all that, I'll keep the K&N no problem. I clean and re-oil once a year. Cheaper than OEM in the long run too.
According to Yammy, you're supposed to clean your OEM air filter with compressed air every 4000 miles, replace as necessary.

3.8 should tell you everything you need to know. But if you like your engine sucking dirt - you are k&n target customer

 

[AtlRiderrr]

I’ve had K&N’s on many vehicles over the years with never a problem. Whenever I go to clean them…the inlet side is dirty and the engine side will still be squeaky clean and still the color of new oil. My FJR with 30k+ miles on it has one now…. My VFR with over 75k miles on it has one, my IS350 with 172k miles on it has one. They all run like tops. The key with them is to stay after the cleaning…and don’t over or under oil them.

 

[Whooshka]

Same here. No fueling, ring, guides or valve wear in any bike I've had K&N's in.

 

[Whooshka]

3.8 should tell you everything you need to know. But if you like your engine sucking dirt - you are k&n target customer

This was in 3.8... "The actual filtering efficiency of the K&N filter will be higher in real life scenario due to the increased surface area exposed to the air stream".

So much for lab tests.

 

[SmashVol]

Had K & N on all my cars and bikes with no issues. Use what you like.

 

[chucksklrst]

I use Hi-Flows in all of my bikes. In short use the Hi-Flow.