Air Filter and Exhaust ????? - TwoWheelForum: Motorcycle and Sportbike forums
 
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post #1 of 12 (permalink) Old 06-17-2006, 10:29 PM Thread Starter
 
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Air Filter and Exhaust ?????

Okay guys. I just bought my bike and it has a two brothers racing pipe on it. When I bought it the guy gave me a brand new K & N air filter for it.

Do you guys think I should put it in. The only reason I ask is becasue I have seen a few posts where people recomended not putting in a K & N filter.

Also, if I should put it in, should I get my carbs jetted afterwards and how much does that generally cost.

Thanks for any help guys and gals,

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post #2 of 12 (permalink) Old 06-18-2006, 12:40 AM
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The K&N filters are great with older bikes. With jetting and full exhaust. The filter will be mandatory. If its just a slip-on pip. You could benefit from having the carbs tuned and or jetted.

The new OEM filters and air boxs on new bikes move air so well. The aftermarket is having a hard time improving. The big advantage is that you only buy one for the life of the bike. Just clean reoil vs. new every time.

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post #3 of 12 (permalink) Old 06-18-2006, 12:43 AM
 
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I've also heard some bad on K&N for bikes...they say the OEM is best...however BMC Race filters are prooven to be the ultimate best, however some remapping and tuning will be required for a BMC race filter.
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post #4 of 12 (permalink) Old 06-18-2006, 12:55 AM
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Quote:
Originally Posted by R1up0n1
I've also heard some bad on K&N for bikes..
Nothing bad about K&N, especially on carbed bikes. (if carbs are tuned accordingly)
The OEM filter on FI bikes usually dyno a slight % better in most every Dyno comparison I have seen or read about. The BMC's are only slightly better but still a lifetime filter.

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post #5 of 12 (permalink) Old 06-18-2006, 12:58 AM
 
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Quote:
Originally Posted by jeeps84
Nothing bad about K&N, especially on carbed bikes.
The OEM filter on FI bikes usually dyno a slight % better in most every Dyno comparison I have seen or read about. The BMC's are only slightly better but still a lifetime filter.
I myself never had a problem with my K&N on the SV, I've just heard that the k&n will restrict some airflow, which is something you don't want...you want as much air in as you can.
Either way a K&N is still a great filter...clean it and not having to worry about replacing it!
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post #6 of 12 (permalink) Old 06-18-2006, 11:33 AM
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When I put the K&N in on my 9R after the slip on... it had a bad hesitation in the mid range RPMs when I would WOT. Had it rejetted by a local guy for $125. Had about a 20hp gain from stock with that setup!




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post #7 of 12 (permalink) Old 06-18-2006, 11:44 PM Thread Starter
 
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Thanks for the responses guys....This helps.

I think I will go ahead and put the K&N filter in and then go staight to the mechanic and have the carbs jetted. The bike has 21,000 miles so even if the K&N filter does not require me to get the carbs tuned up, it might be good for it anyway.

Later guys and gals

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post #8 of 12 (permalink) Old 06-19-2006, 12:04 AM
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I would say its a good call to have'em retuned. Especially with that kind of mileage.

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post #9 of 12 (permalink) Old 06-19-2006, 06:53 AM
 
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Quote:
Originally Posted by jeeps84
I would say its a good call to have'em retuned. Especially with that kind of mileage.




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post #10 of 12 (permalink) Old 06-19-2006, 10:55 AM
 
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with 21k miles, it cant really hurt to get your carbs tuned. in fact, its scheduled maintainence in my book. worst case scenario, your mechanic tunes the carbs and the bike runs REALLY REALLY well.
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post #11 of 12 (permalink) Old 06-19-2006, 02:50 PM
 
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The ram air factor isn't included when you dyno a bike. So maybe the stock performed better on the dyno, but when you're going 100+ and the air is being forced nto the air box it could be a different story...or not. I know that once I have the money for a pipe and air filter I' getting a BMC filter and probably a Graves system...or GYT-R again.
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post #12 of 12 (permalink) Old 06-19-2006, 11:52 PM
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The problem with the ram air more so on a carbed bike is the rammed air can actually lean out the bike while its in motion.




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