Dust in airfilter box

Antti

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At last winter i had airfilter box a part as i worked on bike (painted rear frame etc). Then I carefully cleaned the airfilter box and when fitted filter i even used some rubber grease on sealings to make sure they seat properly. I have always been quite fanatic to make this sure on my bikes.

I have driven only some 3000 kms this summer, last trip was 2000 kms mostly on "semi"dusty gravel roads. Now i checked the filter an found some fine dust inside. Filter is some pattern product (maybe Hiflo). Would the filter just be so bad that it leaks dust trough? Sealins seemed to be OK. I have used same kind filters on other "road"bikes and haven`t had any leakage before this. Of course not for serious offroad.

However i just ordered Unifilter with prefilter wich has been on my list for some time. Worked fine on Xchallenge. With K&N it had some serious problems :P

 
That's not dust ...

... it's a alien invasion :eek: Serious amount of 'debris' there, is it plant or mineral ?
 
Looks like something has decided to nest in your air-box. Any sign or rodent faeces/stained filter element?
 
This is how Unifilter kit looks like, don't think it'll let any dust trough.

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