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dfgdfhbfgnf
Borekit Bruiser



Joined: 28 Jun 2012
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PostPosted: 18:15 - 29 Mar 2014    Post subject: .. Reply with quote
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Last edited by dfgdfhbfgnf on 11:58 - 30 Mar 2014; edited 1 time in total
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Boris the spider
Nearly there...



Joined: 24 Jan 2013
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PostPosted: 18:21 - 29 Mar 2014    Post subject: Reply with quote
Be interesting to see if it works.
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Yes I'm a pig....And yes... The working public do pay my wages. Tho I contribute to your benefits you lazy c##t. You do not pay my wages. So go fcuk yourself.
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stevo as b4
World Chat Champion



Joined: 17 Jul 2003
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PostPosted: 18:33 - 29 Mar 2014    Post subject: Reply with quote
I know as well as anybody that noise does not necessarily equal power, but if your wanting to increase performance it has to be at the expense of something else normally, and in most cases the first thing to be sacrificed is noise level.

I'll be doing an airbox lid mod on my KMX125 when it's run in, and I will have a back to back dyno run carried out and see if it's as restrictive as I think it might be. I might be slightly over jetted at the moment, so it will be interesting to see the effect on fuelling with no airbox lid etc.

Is your YBR injected or carb fed? And what are you doing about fuelling when you change the intake/exhaust set up etc?
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CaNsA
Super Spammer



Joined: 02 Jan 2008
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PostPosted: 13:33 - 30 Mar 2014    Post subject: Reply with quote
Quote:

Hi

Today I decided to experiment with my air box of my ybr125 to make it draw more air into it. At the top of it under the seat there is the airbox inlet and it has a rubber intake. I could removed it but at idle there is an odd ticking noise that can be heard so I wanted to improve it but not removing it completely. I cut the middle bit so that the hole have a bigger area. That's the only thing you can do to improve some throttle response without make the bike unbearable to drive because I had tried fitting a cone filter directly to the throttle body with a silicone hose but the drone at wot was unbearable.

https://i.imgur.com/utT4apk.jpg

https://i.imgur.com/rhWxWah.jpg

https://i.imgur.com/s47TwIG.jpg

https://i.imgur.com/PwBdTxj.jpg

https://i.imgur.com/68sVtFd.jpg
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Pete.
Super Spammer



Joined: 22 Aug 2006
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PostPosted: 13:54 - 30 Mar 2014    Post subject: Re: .. Reply with quote
dexterford wrote:
Hi

Today I decided to experiment with my air box of my ybr125 to make it draw more air into it. At the top of it under the seat there is the airbox inlet and it has a rubber intake. I could removed it but at idle there is an odd ticking noise that can be heard so I wanted to improve it but not removing it completely. I cut the middle bit so that the hole have a bigger area. That's the only thing you can do to improve some throttle response without make the bike unbearable to drive because I had tried fitting a cone filter directly to the throttle body with a silicone hose but the drone at wot was unbearable.

https://i.imgur.com/utT4apk.jpg

https://i.imgur.com/rhWxWah.jpg

https://i.imgur.com/s47TwIG.jpg

https://i.imgur.com/PwBdTxj.jpg

https://i.imgur.com/68sVtFd.jpg



You really think that center divider is restrictive? Look at the size of the carb throat and the size of the passages in that rubber boot. It's probably got ten times the cross-sectional area of the carb.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good Very Happy
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