K@N air filter;Stock air box

[poker007]

I was woundering if  if this will change the way the bike runs. Will i have to change the jetting ? i have 36k on bike everything is stock. Any info would be helpfull thanks...

[movenon]

IMO, no... I have the same filter (it came with the bike) and my box is so open that it is non existent. I am at 2950 feet , main jets 112 fuel air screws out at 2.5 turns, needle at the 4th slot down. with a Cobra F1 exhaust ( very light and free flowing). And I run fine.  But I don't run hard or extended times above 6 or 7,000 RPM.

I "might" be a little lean on the top end at sea level. Guess I will find out in a few weeks . If that's what you want to run for an air filter then you might adjust your fuel air screws to the rich side ? If you do, turn the screws out to enrichen, and turn in to lean. The screws control fuel not air.

If you are going to buy a free flowing filter then I would recommend you check RPM's WEB site out for uni pods http://www.rpmracingca.com/proddetail.asp?prod=Carb%3ARPMPod&cat=24. They are easier to deal with than the K & N in a stock box, unless you did what I did to my box. The Uni's probably filter better also. I don't know that I helped you much but thats about all I have on the subject.
George

[RichBaker]

Be aware that K&N filters let a LOT of fine dust thru, they don't filter very well at all. Plenty of research available to google that. UNI filters are much better and they also have an insert for the stock airbox. About the only jetting change I'd recommend with either is 40 pilot jets, assuming stock exhaust.

[poker007]

thanks for the info George and RichBaker, this is very helpfull .. everything is stock . no header yet am holding our for R.P.M to put one out soon.. ..i was told when i bought the 85 FJ 1100 the air cleaner was changed..  .. today i found a big rats nest is side..And i thought she was already fast  .. time to go for a little pin it test thanks again,,, this site rocks,, Mark Glorioso

[movenon]

thanks for the info George and RichBaker, this is very helpfull .. everything is stock . no header yet am holding our for R.P.M to put one out soon.. ..i was told when i bought the 85 FJ 1100 the air cleaner was changed..  .. today i found a big rats nest is side..And i thought she was already fast  .. time to go for a little pin it test thanks again,,, this site rocks,, Mark Glorioso

Just be careful Mark, shes a hand full  If you use the K & N I would recommend the K & N filter oil and keep it serviced.
George

[andyb]

Be aware that K&N filters let a LOT of fine dust thru, they don't filter very well at all. Plenty of research available to google that. UNI filters are much better and they also have an insert for the stock airbox. About the only jetting change I'd recommend with either is 40 pilot jets, assuming stock exhaust.

+1

The UNI in-box filters are also really easy to clean by comparison.

[Yamifj1200]

" this site rocks,, good Mark Glorioso"


Welcome and you have no idea how these folks can help you and become your best friends.. JMO


Eric M

[poker007]

hi Eric, i am greatfull for this site/ I learn something every day from other FJ'ers, by reading about all the different topics that are on here .I must say my 85 FJ runs quite well now i took the nest out of the air box, and put the new K@N in.. I must say the FJ is very much
a rocket. I do enjoy riding with all my heart, and hopefully soon maybe we can go for a spin, Richmond isn't that far Ty ,,Mark Glorioso

[Mark Olson]

hey Mark , I got 4 k/n singles if you wanna lose that air box . yours for the taking .
I am just up the road in Citrus Heights.

MarkO

[poker007]

hey Mark , I got 4 k/n singles if you wanna lose that air box . yours for the taking .
I am just up the road in Citrus Heights.

MarkO

  Thank you MarkO, Very nice,I am going to put the singles off, until after i go with the R.P.M Header that should be out soon, And hoping to do a stage1 or three. i need to check with Randy at rpm and find out more about their header There is a lot i  am going to do. I look forward to going riding with you, and other FJers,, This site is one of a kind Thank you for the singles, they will be needed very soon...
                                             MarkG