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Discussion Starter #1
Hello everyone,
Recently opened airbox to exchange stock air filter to DNA and my eyes appeared a terrible view (see photo). :blur:

IMG_5570_small.jpg

Is this normal? Which way would drift so much junk?
I would add, that the airbox was never previously opened.

ciao Robert
 

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Muck in there is normal, and what muck depends obviously where you are/ride, if you in a dusty sandy region id open her a bit more often and ensure the filter is doing its job......mine has road grit and leaves as well as a little collection of insects. the DNA will keep the muck out as long as you keep the DNA in good order.

If you look at the size and location of the air box intakes its a wonder you don't find the odd kitten or missing person in there.
Its when you have muck the other side of the filter you want to worry:doh:
 

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Discussion Starter #3
[...] Its when you have muck the other side of the filter you want to worry:doh:
... but look at the picture - this is the other side of the filter! ;)
This picture shows the inside of the airbox, after removing the top cover but before removing the filter. In this place there is the filtered air.
Under the filter I found dung of which you write - leaves, insects ...

greets
 

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See what you mean but isn't the filter in contact with the bell mouths, which means this doesn't get in, I hope. If that has gone in it would give you a free rebore.

coulnt really seethe photo as looked on my phone and it's not displaying photos correctly.
 

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Is this normal?
The stock filter should be oiled, and NOT from a spray can. If oiled properly it will expand and seal at the edges against the airbox. If it is dry, it won't filter much.

So......
Was it oiled?
Was it sandwiched between two plastic grilles?
 

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I agree,

A lot of mechanics use the filter oil in a spray can which just doesn't work on these foam filters. It's not sticky enough.

I've always used Motul filter oil and never had an issue with dirt getting past the foam. It can be a messy business though!

Mike
 

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Discussion Starter #8 (Edited)
do you have a breached seal either on the airbox or around the filter ?
As I wrote earlier, the airbox was never previously opened.
Maybe a faulty installation by the manufacturer was :rolling:

[...] Was it oiled?
Was it sandwiched between two plastic grilles?
Yes, the filter was pre-oiled. Ofcourse, both plastic grilles were fitted.


I have a suspicion where the sand: probably been sucked through the hole, where is linkage flaps (inside airbox - between dust and clean chambers). Around the tendon is enough space to dust and fine sand flew, bypassing the filter :doh:. Could it be a faulty design :confused::rolleyes:
According to me there should be some rubber seal, as it is the place where the cable enters in the airbox (see photo).

thanks for suggestions :bow:
 

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That looks like another good reason for disconnecting the air box flaps and sealing up the cable hole. Remember it will probably run a bit rough if you don't remap afterwards though
 

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Discussion Starter #10
Yes, I am aware that any change usually involves the tuning map.
In my Nelli stock map was already require changes how disconnected the exhaust valve - engine choked up when leaving the idle speed.
 

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That much sand with the airbox flaps in place?

Hello everyone,
Recently opened airbox to exchange stock air filter to DNA and my eyes appeared a terrible view (see photo). :blur:

View attachment 7452

Robert,
Hope your bores were sand-free!
Have just removed my airbox again, (to replace my centre coilstick) and have found almost as much sand in mine, but thankfully on the inlet side of the DNA airfilter!
I am amazed that so much sand could get into mine after just 16 kms of sandy track (at very low speed) and gravel road (at moderate speed).
I have removed the flaps and was thinking about re-installing them without the cabling as a sand-deflector/baffle.
A little fine dust got past the DNA filter's edges, so will be adding more grease when I re-install.
There was a lot of dust in the air, especially over the sandy track, but that's what you expect at Australian rallies.
Cheers.
 

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Discussion Starter #12
Hi Pilgrim
Thanks for your valuable comments. Once again I will mention during the assembly of DNA. :clap:
I'm thinking of installing a metal mesh net at the entrance to the airbox - do not solve the problem of sand. According to me, the sand is thrown by the wheel - practically are selected grains of sand of a similar size. I fear only that the grid can reduce the amount of air supplied to the engine.
Your solution with flaps can be more efficient. I think I'll work on it, until I got dismantled motorcycle.
cheers
 

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Discussion Starter #13

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Note that mesh can be surprisingly restrictive to air flow, even though you can see through them. I wouldn't be surprised if that has almost halved the available inlet area.
 

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Discussion Starter #15
Note that mesh can be surprisingly restrictive to air flow, even though you can see through them. I wouldn't be surprised if that has almost halved the available inlet area.
The first tests "on dry" done and the grid does NOT reduce air flow. The only danger that I see is the possible suppression of by the leaves. Solution: do not ride in the autumn :rolling:
 

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Surely easiest mod would be a fender extender so that the sand isnt thrown up but under the engine, i;)
 
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Discussion Starter #18
Surely easiest mod would be a fender extender so that the sand isnt thrown up but under the engine, i;)
Yes, here you are 100% right, but how much will lose a beautiful look? :)

PS. What about insects :confused:
 

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Porn talk oh yessssssss.
:beat:
as for spoiling the look i dont think so...and at least it wont be getting a rebore....as for flies thats what the filters for :)
 

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To go with the punch ... :ele:

i made simple mod:
http://www.benelliforum.com/forum/members/moczul-albums-airbox-insects-sand-protection-mod.html

:blowup:

...and wait for spring to test :(
I did a similar mod two years ago and it does not affect to the performance. I think is fully recommendable to reduce dust in the air box. About the sand inside the "clean area" of your air box, check carefully the flange of the upper cover, is very short and easy to bend if incorrectly assembled. Due to the airbox design I think is almost impossible that this sand come by the air intake duct but from a point near where you found the dust, like the above mentioned.


 
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