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Message started by jabman on 09/09/09 at 10:02:00

Title: crankcase breather filter?
Post by jabman on 09/09/09 at 10:02:00

I'm looking to ditch the air box for a cone filter, but what do i do with  the crankcase breather tube, do I just pull it out of the box and stick a mini crankcase filter on it?  what happens to any junk that comes out of the tube?

also what size K&n filter do i need to fit go on the stock carb inlet rubber?


Title: Re: crankcase breather filter?
Post by SimonTuffGuy on 09/09/09 at 10:46:54

I just installed one of the mini crank case filters on mine. Got it for $10 from Advance Auto.

I haven't had anything come out of my filter yet, but I can tell it's got some oil in it and it's going to need cleaned or replaced at some point.

I've got a cone filter from Lancer (they were being sold via the board store), but I don't remember the dimenions. I know the K&N part # has been posted time and time again though if you search for it.

Title: Re: crankcase breather filter?
Post by dasch on 09/09/09 at 13:42:23

I've done it, I have it... and I can't remember the KN part #  :-[  :-[  Search on ebay, that's how I got mine.

You need some kind of breather filter, for now I simply jammed a paper core fuel filter in the hose, but you need something.

Title: Re: crankcase breather filter?
Post by jabman on 09/09/09 at 14:14:35

http://www.knfilters.com/search/product.aspx?Prod=RU-1710

RU-1710

the only one ive seen here is this one?  i have to get some measurements to make sure it fits

Title: Re: crankcase breather filter?
Post by Gort on 09/09/09 at 15:39:12

I did this, and I got it from Autozone:
http://i277.photobucket.com/albums/kk80/tlukatch/OILBREATHER.jpg

Title: Re: crankcase breather filter?
Post by jabman on 09/09/09 at 15:44:51

ill put one of those on the end of the tube

Title: Re: crankcase breather filter?
Post by Ed L. on 09/09/09 at 16:18:49

An inline fuel filter from a lawn mower works great, get two and use the other on the fuel line.

Title: Re: crankcase breather filter?
Post by dasch on 09/09/09 at 17:48:15

And this is your Air filter:

http://www.knfilters.com/search/product.aspx?Prod=RC-1250

Mounts on the carb itself, not on the rubber.

Title: Re: crankcase breather filter?
Post by Gort on 09/09/09 at 18:04:30


72797A757976180 wrote:
ill put one of those on the end of the tube




Some members recommend that you run the filter higher than the engine, so that condensed oil fumes will run back down the hose into the crankcase.  I ran mine lower than the top of the engine and it sometimes will let go a drip of oil.  

Title: Re: crankcase breather filter?
Post by Savage_Amusement on 09/09/09 at 18:46:30

I got mine from a motorcycle store locally and it is orange and black. I just took my tube in with me and we found something to fit inside and I used a clamp to keep it tight. I also have since trimmed my tube way down so it is right under my tank. I also have a '75 sportster tank.

Title: Re: crankcase breather filter?
Post by thumperclone on 09/09/09 at 19:03:18

above the carb is minimal..
got a crank case breather on thumperclone and its way above the horz pistion head...
she takes me up beyond 10K' asl when i gho campin and the lil filter is still dry
got it at a moto mini web site too long ago to have the receipt..
but any small filter that fits the tube will doo IF its high enuff higher the bettter!!

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