K&N  Air Filter

[hayabusa1967]

Hello anyone using these in a stock bike ?? do you need to do any adjustments my bike is totally stock with only a TRE just thinking it may affect it with more air flow??

 

[grabntwist]

your stock ecu should probably adjust. It might even richen up a bit,believe it or not when it comes to the busa the paper filter (stock) is probably better for flow. The only advantage w/a K&N is that you dont have to replace it. When I put my full system on I dynoed the same w/ my stock filter as with none at all. Then about 1-3hp less w/ a K&N, top end being about 1 hp loss

 

[BA BUSA]

K&N makes good products but their air filter for the Busa doesn't seem to work. Try BMC air filter it's what Yoshimura uses and I've heard nothing but good about them.

 

[justintime2]

From what I have read you have to re-map with a BMC Race filter.

 

[rustman]

I've heard the same about the BMC "race" filter flowing better, and that the K&N flows worse than a clean stock filter. Of course, I got a K&N first thing. Now I'm considering a BMC before I go to the dyno. Also, just as an aside: when I put an HMF dual high-mount full system on with the K&N, the bike seems to be running pretty rich. I haven't pulled the plugs, but the exhaust pipes look pretty sooty. Mileage has dropped alot too. Hopefully, the TEKA tune (coming in a week or so) will solve this.