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Old September 4th, 2014, 05:12 AM   #5
DaBlue1
Long Time Rider
 
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Name: Blue
Location: Charlotte, NC
Join Date: Sep 2010

Motorcycle(s): 2009 Kawasaki Ninja 250R

Posts: A lot.
Quote:
Originally Posted by Ducati999 View Post
....I have removed the Screen in the airbox and shimmed the needles but still have the stock air filter on my 2012 Ninja 250. I have cored out a stock exhaust and it sounds great, and i am working on removing the cat from the spare header pipe i have to see if it makes a difference.

If you want more airflow with the stock airbox, try a much less restrictive air filter and bigger header pipe (as suggested by Racer X), it's much easier than hacking the stock one. Also keep in mind that you more than likely will want to increase your jet size a tiny bit. Experimentation is the key.
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