October 5th, 2018, 12:05 AM | #1 |
ninjette.org newbie
Name: Jacob
Location: Encinitas
Join Date: Oct 2018 Motorcycle(s): 2009 kawaski ninja 250r, 2005 kawaski ninja zx6r Posts: 1
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take out airbox?
I have a 2009 ninja 250r with the engine off and I plan on selling it as soon as I get another engine in there. I was thinking of removing the stock airbox and just putting an aftermarket now that it's off before putting another engine in there since this is a convenient time to do so. Is that a good idea? What should I know before putting in an aftermarket airbox? If I were to put one in, what do you guys recommend?
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October 5th, 2018, 06:03 AM | #2 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
MOTM - Oct '18, Aug '17, Aug '16
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Changing the intake system will open a can of worms that's best left closed.
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October 5th, 2018, 06:31 AM | #3 |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
MOTM - Jun '18, Oct '16
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You will find aftermarket "pod filters" to replace the stock airbox and filter, but not an aftermarket airbox.
In general it's going to cause you more work and some time tuning to get it to run right with pod filters - and it's not an improvement in all areas. |
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October 5th, 2018, 07:07 AM | #4 |
CCS Amateur #501
Name: Dave
Location: Iowa
Join Date: Jun 2015 Motorcycle(s): '09 250 SE 'Booger' Posts: 406
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For a street bike, dont bother. You will lose some torque in the lower half of rev range. Unless you switch to a full exhaust you wont gain much on the top end.
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October 5th, 2018, 12:30 PM | #5 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Also expect a lot of stumbling, especially in cross-winds.
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October 6th, 2018, 12:10 PM | #6 |
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Name: -
Location: -
Join Date: May 2009 Motorcycle(s): - Posts: A lot.
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I just finished (in the summertime of this year) a pretty big effort to re-install the OEM airbox on my '05 EX250 Fuel Injection project bike.
Way back in 2009-2010 when I first modified the bike with fuel injection I took the easy way with regard to "packaging" all the necessary components (both the remaining original items + all the new FI components). There's just not a lot of room inside the EX250's frame and getting rid of the OEM airbox was an easy/quick way to get a lot of room to position things that weren't there before, like the FI fuel pump. During the "pod filter years" (Fuel Injected + pod filters) I felt like the bike performed about as well as it had before modifications with one exception, the pod filter solution just didn't feel as good as the OEM airbox in the 8,000 to 12,000 RPM range where (I believe) the volume of the OEM airbox was specifically design-targeted by the Kawasaki engine guys to achieve a resonant frequency. If you're one of those EX250 riders who regularly take the engine up to the 12,500-ish range you'll know what I'm talking about. I came to believe that the pod filters might have better performance through the legendary EX250 "flat spot" in the 5,000 to 7,000 RPM range. My guess is that's the weakest part in the OEM airbox performance. You can never "have it all" so the Kawasaki engineers probably had to accept this situation if they were going to give the OEM airbox its 8,000 to 12,000 sweet spot. |
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October 6th, 2018, 03:31 PM | #7 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
Join Date: May 2017 Motorcycle(s): 2015 moto guzzi norge,2020 aprilia dorsoduro, 2014 yamaha fjr, 85 yamaha fj 1100 Posts: A lot.
MOTM - Feb '18
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if u do switch i have k/n pod with stock intake boot(airbox side) or uni individual pods. i sell em to ya at a great reduced price. be ready to do some tuning
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"trying not to get old" |
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October 11th, 2018, 06:56 AM | #8 |
Ninja 250 and beta 300
Name: Matty
Location: Chocolatetown USA
Join Date: Oct 2018 Motorcycle(s): 2004 Kawasaki Ninja 250 Posts: 14
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Hey check out my video i put in pods filters and split the airbox in half to take it out. you can find a jet kit pretty cheap if you know what specific main and pilot jet you need not the kit which is more expensive if you want to add an intake and exhaust i did with mine youll have to tune them i think you would really benefit from my videohttps://www.youtube.com/watch?v=CO4vg6W69cs&t=27s
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check out the youtube ninja 250 motovlogshttps://www.youtube.com/watch?v=CO4vg6W69cs&t=81s |
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October 15th, 2018, 04:50 AM | #9 |
Board Member
Name: ...
Location: WI
Join Date: Dec 2011 Motorcycle(s): 250R (street), 250R (dirt) Posts: A lot.
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I am working to put my airbox back in after years of not having it. I am interested to see if it clears up some of the tuning issues I have had with the pods.
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