K&N Filter

[Cusimano]

is it true that k&n air filters are bad for our (gs500e) bikes, if you have a stock exhaust?

[JetSwing]

where's alpha? come, answer the question!

seriously, what kind of filter were you thinking about? if you get the drop in replacement filter, you should be good.

[ballyhoo]

I have the drop-in replacement K&N on a stock 2001 and it runs perfectly.

[Cusimano]

the k&n filter i have, fits right onto the carbs. Where i had to remove the orginal air box. is that kind  of filter 'BAD', cause thats what the dealer is telling me that its really bad for the bike to have on it.

[JetSwing]

that's why i don't go to the dealer other than to get my tires swapped.

i have the lunchbox filter myself and i have no problems. but you do have to reject your carbs

[Alphamazing]

http://home.usadatanet.net/~jbplock/ISO5011/SPICER.htm

That's one of the tests done with the leading manufacturers of air filters. The K&N consistently performed poorly.

To get higher airflow, you must sacrifice filtering. The more stuff used to filter out the crap in the air the less airflow you get. The less stuff you use to filter the more airflow you get. Simple.

The GS engine is pretty durable as it is, which is why I'm using a K&N drop in with a restrictor. The bikke comes rich in the upper end from the factory, so I'm using mine to correct that.

[makenzie71]

http://home.usadatanet.net/~jbplock/ISO5011/SPICER.htm

That's one of the tests done with the leading manufacturers of air filters. The K&N consistently performed poorly.

That test is aimed at filtration quality, no flow or performance...of course the K&n is going to do poorly there.  That test also shows that the filter has superior to flow to all the others in the test, which is what K&N advertises.

I like Apex'i filters, though.  Superior flow to the K&N, and superior filtration.

~~Forgot to answer the question:

No, open element filters will not cause your bike any noticeable harm.  However, it is important that you keep them clean and oiled propperly at all times.

[scratch]

The GS engine is pretty durable as it is, which is why I'm using a K&N drop in with a restrictor. The bike comes rich in the upper end from the factory, so I'm using mine to correct that.

You mean lean, right?

[Alphamazing]

The GS engine is pretty durable as it is, which is why I'm using a K&N drop in with a restrictor. The bike comes rich in the upper end from the factory, so I'm using mine to correct that.

You mean lean, right?

Nope. From the factory, the bike comes lean in the lower end and rich in the top end.

[Alphamazing]

http://www.gstwins.com/forum/viewtopic.php?t=21789