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K&N for SP

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Robert View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Robert Quote  Post ReplyReply Direct Link To This Post Topic: K&N for SP
    Posted: 19 Dec 2020 at 20:12
I’m thinking of fitting a K&N MG-2640 air filter to my 82 Sp, but what do I need to do with breather set up.
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Chris A View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Chris A Quote  Post ReplyReply Direct Link To This Post Posted: 19 Dec 2020 at 20:38
You need either the Le mans or Agostini type of breather boxes.
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Ken-Guzzibear View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken-Guzzibear Quote  Post ReplyReply Direct Link To This Post Posted: 20 Dec 2020 at 09:16
get the breather box, someone fitted a landrover breather, no idea about that one but they work.

Anyhow if you fit the lemans breather disable the flapper valve inside with a screwdriver. 

You will then need to replace the large angled pipe from crankcase with short straight one same dia

At that time fit a new ball check valve in the top of that breather

Fit the 2 rocker breathers to the Y shaped pipes on top ov the breather box

The smaller of the breathers at the bottom needs a long breather pipe some take it to a catch bottle/tin others loop it up along the frame and let it exit at rear no plate like Brit bikes did

Gutsibits usually have the breather boxes or Reboot
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David Nimrod View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote David Nimrod Quote  Post ReplyReply Direct Link To This Post Posted: 20 Dec 2020 at 10:01
Is it worth it..?
Moto Guzzi Breva 750 (2007)
BMW R1150GS (2003)
Harley Softail (1989)
Harley Electra Glide (1988)

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theone&onlymin View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote theone&onlymin Quote  Post ReplyReply Direct Link To This Post Posted: 20 Dec 2020 at 13:07
One answer to this question would be another question so it would.
How often you check / change your airfilter ?

Cheers
Min

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Ken-Guzzibear View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ken-Guzzibear Quote  Post ReplyReply Direct Link To This Post Posted: 20 Dec 2020 at 13:10
Having done this yrs ago i would say absolutely worth it the oem air filter on early Guzzis is useless they collapse and are a major job to change once done the K&N needs attention every 10k miles and is easy to do 
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David Nimrod View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote David Nimrod Quote  Post ReplyReply Direct Link To This Post Posted: 20 Dec 2020 at 15:29
Personally, I like K&N filters, I have them on three of my bikes.


Moto Guzzi Breva 750 (2007)
BMW R1150GS (2003)
Harley Softail (1989)
Harley Electra Glide (1988)

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