2020 KX250 air box?

Titan777
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Titan777
Edited Date/Time 3/20/2020 11:18am
I just got my new bike and noticed the right air box side is blocked and not cut out like other bikes I saw on showroom floors.



Any idea why?
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scott_nz
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scott_nz 3/19/2020 6:40pm
3/19/2020 6:40pm
Titan777 wrote:
I just got my new bike and noticed the right air box side is blocked and not cut out like other bikes I saw on showroom...
I just got my new bike and noticed the right air box side is blocked and not cut out like other bikes I saw on showroom floors.



Any idea why?
noise regs, quite often the muffler is diffrerent as well,
Titan777
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Titan777 3/19/2020 6:44pm
3/19/2020 6:44pm
scott_nz wrote:
noise regs, quite often the muffler is diffrerent as well,
Does this have any impact on performance?

Should I cut the side or leave it as is?
bvm111
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bvm111 3/19/2020 6:54pm
3/19/2020 6:54pm
The 16-18 450 had the double cut out, but the 250 always only had the left side open. I believe you can cut it out with a dremel but I don’t know if there is any performance to be had... the cut outs are as big as a barn door!
scott_nz
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scott_nz 3/19/2020 6:57pm
3/19/2020 6:57pm
scott_nz wrote:
noise regs, quite often the muffler is diffrerent as well,
Titan777 wrote:
Does this have any impact on performance?

Should I cut the side or leave it as is?
You could cut it out , it would do no harm

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Titan777
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Titan777 3/19/2020 7:21pm
3/19/2020 7:21pm Edited Date/Time 3/19/2020 7:25pm
bvm111 wrote:
The 16-18 450 had the double cut out, but the 250 always only had the left side open. I believe you can cut it out with...
The 16-18 450 had the double cut out, but the 250 always only had the left side open. I believe you can cut it out with a dremel but I don’t know if there is any performance to be had... the cut outs are as big as a barn door!









They are all cut out in 2020 (mine isn't. lol)
vitalriderCrf 3/19/2020 8:04pm
3/19/2020 8:04pm
It’s not something inside the air box that you could just remove? It’s for sure a part of the entire air box?
seth419
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seth419 3/19/2020 9:34pm
3/19/2020 9:34pm
vitalriderCrf wrote:
It’s not something inside the air box that you could just remove? It’s for sure a part of the entire air box?
Ditto on this. Have you taken it apart yet? It doesn't even looked like its attached to the side plate.
pCp 252
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pCp 252 3/19/2020 10:25pm
3/19/2020 10:25pm
Certain markets, I believe Australia ? Maybe Canada? Receive the closed right side airbox on the 2020 while the US models have both sides open. 17-19 had the right side closed in all markets.
vitalriderCrf 3/19/2020 10:28pm
3/19/2020 10:28pm
pCp 252 wrote:
Certain markets, I believe Australia ? Maybe Canada? Receive the closed right side airbox on the 2020 while the US models have both sides open. 17-19...
Certain markets, I believe Australia ? Maybe Canada? Receive the closed right side airbox on the 2020 while the US models have both sides open. 17-19 had the right side closed in all markets.
This. I remember when the 2017 CRF450 came out people in Europe all had closed air boxes just like this KX. I’ve never seen any bikes in the US with it though.
bvm111
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bvm111 3/19/2020 11:23pm
3/19/2020 11:23pm
bvm111 wrote:
The 16-18 450 had the double cut out, but the 250 always only had the left side open. I believe you can cut it out with...
The 16-18 450 had the double cut out, but the 250 always only had the left side open. I believe you can cut it out with a dremel but I don’t know if there is any performance to be had... the cut outs are as big as a barn door!
Titan777 wrote:
[img]https://i0.wp.com/www.motorcycle.com/blog/wp-content/uploads/2019/06/20KX252B_201GN1DLS3CG_A.high_.jpeg?ssl=1[/img] [img]https://p.vitalmx.com/photos/forums/2020/03/19/411553/s1200_6000000001.jpg[/img] [img]https://cdp.azureedge.net/products-private/prod/7bab67a8-c526-4a41-9c9b-a1bc19de2306/497f2f1f-03d5-4e1d-a079-da010a135f1e/00000000-0000-0000-0000-000000000000/4f3421da-08b9-4b5b-85d4-aa7100341214/314de989-7fc0-4400-b133-aaa400ff6c1f/6000000001.jpg[/img] [img]https://p.vitalmx.com/photos/forums/2020/03/19/411553/s1200_6000000001.jpg[/img] They are all cut out in 2020 (mine isn't. lol)









They are all cut out in 2020 (mine isn't. lol)
I stand corrected... as stated above they must have changed it for 20... strange!
MXBen711
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MXBen711 3/20/2020 3:37am
3/20/2020 3:37am
EU models have closed airboxes on one side. I just took a hot blade and cut a hole in it. The number board covers it anyway so you don't have to be too neat.

Could be an error on the production line or they diverted more bikes to USA. Kawi EU has no bikes left so would make sense
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nascarnate326 3/20/2020 4:53am
3/20/2020 4:53am
MXBen711 wrote:
EU models have closed airboxes on one side. I just took a hot blade and cut a hole in it. The number board covers it anyway...
EU models have closed airboxes on one side. I just took a hot blade and cut a hole in it. The number board covers it anyway so you don't have to be too neat.

Could be an error on the production line or they diverted more bikes to USA. Kawi EU has no bikes left so would make sense
Correct.

I had a 17 and have an 18 now. Cut out both of mine and it does make it noticeably louder and does change the "snap"

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