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Old 03-30-2015, 05:54 PM   #1
Parx400 OP
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Dirt and sand in the intake.

Picked this bike up a few months ago. Installing a sporting wood filter right now and noticed a shit tone of dirt in the intake. Dirt is caked on hard and not very fine.

Cleaning it is dropping sand on to the valves. And tricks to cleaning this with out dropping the dirt in the motor?
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Old 03-30-2015, 06:00 PM   #2
larryboy
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Sell it. Quick.
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Old 03-30-2015, 06:02 PM   #3
Parx400 OP
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Bike is so clean I think it's just oil and dust over the years.

It's pretty dirty though.
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Old 03-30-2015, 06:04 PM   #4
Parx400 OP
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I was thinking of scrubbing it with a wire brush with the shop vac over it to get most of the dirt out.
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Old 03-30-2015, 06:20 PM   #5
Dustodust
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Quote:
Originally Posted by Parx400 View Post
Bike is so clean I think it's just oil and dust over the years.

It's pretty dirty though.
you should not get dirt/grit in intake of a motor EVER

when the filter doesnt get changed it plugs up and the grit finds a way in
the downside of the foam filter (SW/ITG/rottweiler) is that it requires more frequent and messy maintenence than the stock paper before it starts to suck in bypass dirt
the upside is that is is easier to access
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Old 03-30-2015, 06:32 PM   #6
Parx400 OP
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Bike had the stock airbox on it. I was installing the SW/ Rot one.

It seems i can clean this using a wire brush plush shop towels held with surgical tongs with some contact clear on it. goingto take a while but i'm able to pic up any dirt coming on the sides
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Old 03-30-2015, 06:52 PM   #7
Chuckracer
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Pull the carbs/throttle body's.
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Old 03-30-2015, 07:45 PM   #8
Parx400 OP
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not sure this is was mud. its caked on like plaster to the walls. Its cleaning up though and with contact clear soaked towels on surgical tongs im getting no dirt in the motor.
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Old 03-30-2015, 10:48 PM   #9
gefr
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I think vacuum cleaning at the end

with e thin hose to let air get in and swirl, sucking dirt out would clean any loose dirt from inside the cylinders.
Cheers.
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Old 03-31-2015, 05:06 AM   #10
Parx400 OP
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Here is how the bike came to me. This is the first time I have even opened up the air box.



After lots of scrubbing on one side.




Lots of these soaked in carb cleaner.



Parx400 screwed with this post 03-31-2015 at 08:31 AM
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Old 03-31-2015, 08:58 AM   #11
larryboy
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That sucks.

This issue keeps me from buying one of these bikes, seriously reduced life on this engine now.

On my bikes that see serious dirt use I smear grease over every inch of the air box behind the filter as a last line of defense in case of a warped box or poor fitting filter.
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Old 03-31-2015, 09:03 AM   #12
Parx400 OP
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Ya thats why I was putting a Sporting wood filter with no airbox on it.

Well it is what it is. The bike runs great with no funny sounds. I will change the oil, all the screens and hope for the best.
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Old 03-31-2015, 09:08 AM   #13
windblown101
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Dang, that's nasty. How many miles on the bike?
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Old 03-31-2015, 09:17 AM   #14
Parx400 OP
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18K

:(

It was so clean on the outside. Never been down. Bike was spotless when I picked it up.

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Old 03-31-2015, 09:46 AM   #15
larryboy
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Quote:
Originally Posted by Parx400 View Post
Ya thats why I was putting a Sporting wood filter with no airbox on it.

Well it is what it is. The bike runs great with no funny sounds. I will change the oil, all the screens and hope for the best.

On the plus side, I don't see oil running down the valve stems which would show accelerated guide/seal wear. Shorten up your valve check intervals to keep an eye on valve/seat erosion and hope for the best.
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