Ok , thats total crap for advise and you need to put down the crack pipe.
Those K&N filters don't flow that much air . Period . If that's his only mod a Power Commander would be a waste of money .
Just like that Yoshimura EMS Controller is a waste of money.
On the other hand , most fuel injected bikes will benefit from a Power Commander by letting you fine tune the air/fuel mixture and to compensate for certain mods.
But just for filters is a waste of time.

 

ok well even K&N says not to use it with a stock pipe so you do what you like.

 

+1

 

that's nonsense... seriously. Why do you think everyone puts a K&N on ... because of the higher flow rate. You gotta read more.

 

I have read plenty and the general concensus is that the only advantage a K&N offers for newer sportbikes is that it lasts a lifetime. When the liter class started going nuts (around '00) the factory filters improved drastically in order to feed all the horsepower. If you want a lot more air then you'd have to go with a race filter like a BMC but you'd sacrifice filtration. Don't get me wrong -- I've run K&N filters and love 'em. But even with a PCII on one bike and a jet kit on another I didn't pick up significant HP -- just a reusable filter. A PCIII when tuned to the bike will make even a stock bike perform better but just for a filter change I wouldn't say you had to have one.

 

if you search around you'll see that without remapping your emissions you will see a definate loss of power due to the fact that it leans out the fuel mixture... DEFINATE... the only difference is that you generate a different sound from the engine. In fact it reduces the amount of filtration on particulates causing accelerated engine wear. Pointless also because even with a power commander bringing the fuel levels higher to compensate the stock exhaust doesn't allow for the same rate as the K&N filter... you just damage your engine and lose power... SO be as trendy as ya wanna be.

 

you are better taking out the K&N filter and running a power commander... that will just adjust everything real nice.

 

That's just silly talk dude. Less air flow = worse filtration? This is directly from K&N's site:

"Replacement Air Filters for Street Legal Motorcycles - K&N Replacement Air Filters are designed to fit right into the standard OEM motorcycle airbox. No modifications are required by the owner, no jet changes or adjustment of the carburetors is anticipated or suggested. Customer modification of the standard airbox - removing the cover, drilling holes into the side or top will have a drastic effect on smooth carburetion. Modifications will cause the stock system to run lean and reduce horsepower. Keep your motorcycle stock and the new K&N Replacement Element will be good for the life of the engine."

K&N's Site

 

ummm no.. K&N = higher air flow = less filtration... read the whole thing before you comment I'm not going to argue about it.. you don't know what you're talking about.

 

what you just pasted is saying not to drill holes in your airbox because it'll take in more and and won't filter properly... just installation warning/instructions... has nothing to do with the points I was making above.