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air filter ?

  • Thread starter Thread starter skinner1790
  • Start date Start date
S

skinner1790

Guest
so stock air box gs850 should i run the paper k&n or switch to pod filters ? what do people recomend and why i herd bad things on k&n but i want imput please
 
K&N pod filters are fine as long as you jet the carbs accordingly. if set up well you could push up your RWHP to over 160 !
 
Or you can run the K&N replacement filter in the air box. With the pods you need to rejet though
 
Not to hijack the thread, but, when using the K&N replacement should you re-jet then also? The claim from K&N is that it flows more air and lasts forever, if so stock jets would make the engine run lean right?
 
Maybe a little bit more lean, but each case is different. Maybe one size bigger main jet would be better. Some bikes are leaner than others anyway.
The stock filter probably filters out finer dust particles, and will last longer between cleanings.
 
I ran a K&N in-box filter the entire time I owned my GS (about 8 years). It never ran lean.
 
Mostly the GSes were set very lean at idle, and at low power for emissions purposes. The pilot jet and the mixture screw adjustment were set lean. The main jet and needle jet circuits were usually not so lean.

The filter effects the mixture most when making a lot of power, when a lot of air is being drawn through the filter. The engine is usually not too lean there to begin with. At idle with not much air flow the filter does not effect the mixture much.

A one size bigger main jet may help, or it may not. It probably depends a lot on which year 850 you have, and which type carburetor.

Some bikes could use a bigger main jet, on some it's a waste of fuel. Try it and see.
 
bbjumper said:
Not to hijack the thread, but, when using the K&N replacement should you re-jet then also? The claim from K&N is that it flows more air and lasts forever, if so stock jets would make the engine run lean right?
Click to expand...


When I first started to run the K&N filter (stock replacement) in my bike, I didn't have to rejet, it was fine. I only had to rejet when I added the RC pipe.
 
Hi,

I have both UNI (foam) and K&N stock replacement filters for my bike's airbox. I go back and forth using whichever is clean. There's been no need to re-jet. Both work with stock jetting when properly cleaned and oiled and carbs are clean and adjusted properly.

Thank you for your indulgence,

BassCliff
 
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