On changing my air filter today, for the first time, I've noticed that the previous owner has hacked about with the air box cover, drilling holes big and small in the cover, presumably in an attempt to allow the engine to suck more air in? I've seen it done before on other bikes. However, it's made a right old mess of my airbox! Does anyone have any pictures of what it should look like, ie, the correct holes & panels? Please!![confused]
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Too many Holes in Air box Cover!!
- Thread starter DedSetDel
- Start date
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SEXT9
Well-known member
You can delete a big part of that air box base to if you wanted.
Nice one guys thanks, some great ideas here! I see what you mean about there being so many variants though! Mine is very similar to the pics you've all posted for sure, but there are differences! So that servo valve thing on top the air box cover? That would originally have been attached to some sort of exup valve would it? Mine has no cable attached to it and an aftermarket system so I'm guessing as to what it was!
So impressed with my Buell, plus you just don't see them around! Even in London where I live, I only see them occasionally & never Uly's!! Maybe the odd lightning here or there but still rarities! And that's the way I like it, "Exclusive" hell, even Harley's are way more common!! Thanks guys!
So impressed with my Buell, plus you just don't see them around! Even in London where I live, I only see them occasionally & never Uly's!! Maybe the odd lightning here or there but still rarities! And that's the way I like it, "Exclusive" hell, even Harley's are way more common!! Thanks guys!
go cytocis
Well-known member
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- May 28, 2012
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Based on other XB owners reported experiences punching holes in their airbox, the XB doesn't appear to be especially sensitive to this mod. I haven't done it myself, but it doesn't appear like performance is either helped or hurt by doing it.
Certainly current airbox design has advanced light-years beyond the old days when its function was merely to keep hold the filter & meet EPA requirements. Now they are volumetrically considered as a tuned part of the overall intake/exhaust systems to maximize performance. Higher-reving motors seem especially to benefit from airbox design. If you try red-neck engineering an airbox on a 600cc I-4 by drilling & cutting it up, you'll quickly end up with a bike that's un-rideable unless significant alterations are also made to fuel delivery, timing & exhaust.
To the OP, does your bike suffer from any power-band or hesitation issues with your lit cut up like that?
Certainly current airbox design has advanced light-years beyond the old days when its function was merely to keep hold the filter & meet EPA requirements. Now they are volumetrically considered as a tuned part of the overall intake/exhaust systems to maximize performance. Higher-reving motors seem especially to benefit from airbox design. If you try red-neck engineering an airbox on a 600cc I-4 by drilling & cutting it up, you'll quickly end up with a bike that's un-rideable unless significant alterations are also made to fuel delivery, timing & exhaust.
To the OP, does your bike suffer from any power-band or hesitation issues with your lit cut up like that?
From a stock 04 airbox to a cut up airbox it was noticeably more responsive. If they drilled holes in the airboxes it was usually to match the later versions which came with holes in them to increase the air that got through the filter. The older models also had the hole in the frame, so the fact that the inner airbox had no holes was a lot about minimizing noise but our bikes are loud anyway. If the bike does not have the hole in the frame then it will need a vented airbox regardless.
I'm confused, I wonder if the airbox on my uylesses is not the original. I say this because there is no hole in the frame for an air intake & as far as I can tell the airbox itself had no holes in it originally. The holes in it now are 16, 5mm holes on the right hand side of the airbox & the left hand side had a crappy piece of plastic sort of stuck in place with silicone where a previous owner had hacked the entire panel from the left hand side of the airbox. I downloaded pics of my airbox if yer interested. Now if this set up was standard(prior to the previous owners air box mods of course) surely there would be no air intake!
No frame holes & no airbox holes for air to flow in?
Or am I just going mental (yes, but apart from that) and/or missing something really obvious? If I am then I apologise for being such a douche so early on in this forum! Things can only get better if that is the case, surely!
Fanx....[confused]
No frame holes & no airbox holes for air to flow in?
Or am I just going mental (yes, but apart from that) and/or missing something really obvious? If I am then I apologise for being such a douche so early on in this forum! Things can only get better if that is the case, surely!
Fanx....[confused]
Thanks for all the help, advice, pictures guys. I'm doing this on an iPhone so it's difficult to post all the pics at once, so below I've posted links to the pics of both sides of my airbox as it was and as it is now with a red panel to patch the big hole & also the frame. As I understand it now from what others have done I can do away with the original top part of the cover just leave enough remaining to hold the filter in place. Take a look anyway, anyway ideas and advice are always welcome. Thanks. Del....
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