PDA

View Full Version : k&n ?


Honda#4
10-15-2005, 06:07 PM
can u put a K&N air filter on a stock motor.
eldercyclerep
10-15-2005, 06:21 PM
yes you may have to jet your carb some but you still can.
Honda#4
10-15-2005, 06:25 PM
what if u leave the air box off would that work.
Pappy
10-15-2005, 06:34 PM
if its a stock engine, adding a k&n and an open lid should not make jetting changes necassary.
Mxjunkie
10-15-2005, 06:36 PM
No jetting should be nessary, now if you added a pipe then yes.
emaxxjeremy
10-16-2005, 06:34 AM
on my 300ex i added a k&n and left the lid on and it ran like crap, popping and sputtering. i rejetted it and now it runs WAY better than it used to. i think from the factory it is borderline lean. i am also at sea level too tho
Honda#4
10-17-2005, 07:18 PM
what if u had a e series slip on with a K&N would u have to jet then.
emaxxjeremy
10-17-2005, 07:31 PM
i would say yes, because it would increase flow with just a slip on and filter
JOEX
10-17-2005, 07:50 PM
Originally posted by Honda#4
what if u had a e series slip on with a K&N would u have to jet then.
Probably need a 150 or 152 Keihin main jet if it's a 400ex.
10-17-2005, 09:47 PM
my wife has an e-series and she is running 8 discs(comes with 12 installed) and is running a 128 or 130 main with a k&n filter...that think woke that bike up! still aint anything near the 400 though
Honda#4
10-18-2005, 05:50 PM
what would u have to do to leave all the dics in, in terms of jetting or could u leave the air box off and put a K&N on or what.
emaxxjeremy
10-18-2005, 06:08 PM
i run the e series (12 disks) with header, k&n filter and no lid with a 128 main jet. i have run this for a couple weeks now and it appears to still be on the lean side. i am probably going to a 130 to try it.
i will say that adding the exhaust made a HUGE improvement on a bike that i was dissapointed with
yellow400ex05
10-18-2005, 06:42 PM
So if you put a K and N airfilter in a 250ex and left the lid on it would run like crap but if you took the lid off it would run much better?

I read i think on K and N's website that it said no rejetting is necessary.

And anyway I got one question though, is the K and N aifilter good for trail riding or is like a Twin Air airfilter better for trails?
hondarider2006
10-19-2005, 12:07 AM
between the paper filter and the foam....your not going to feel any differences between the two. Its all personal preferance;)