dlabkeeg
XS650 Addict
For all you guy who got rid of the OEM air boxes, what did you do with your crankcase breather? Where did you put the hose/filters and the like? Pics if you got them, please.
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Crankcase breather
- Thread starter dlabkeeg
- Start date
txpowdercoater
XS650 Addict
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I used the one from mikes xs with the rubber bottom, it is used with about 2" of hose , basically tucks into the downward curve of the backbone and the rubber base keeps it snug and no rattles.
dlabkeeg
XS650 Addict
Do you have the single or duel breather powder? Do you mind if I just call you powder? I'll picture you as stark white bald guy. Don't know how old you are, so I hope you get the movie reference.
txpowdercoater
XS650 Addict
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Inked Monkey
XS650 Addict
I just used a cheapo from the parts store. It clamps to the nipple and looks good.
dlabkeeg
XS650 Addict
Could I please get a pic you damn dirty ape. Umm.. I mean inked monkey. I'm all about movie references today.
Inked Monkey
XS650 Addict
Here's a pic of the one from the parts store. I think it was under $10 and comes in a bunch of different colors for all the import tuners. I got red, but I believe there is also blue, yellow and green. It has a soft tube that is part of the filter that clamps to the nipple, so no need for any other hose.
Attachments
bloodthirstysystem
XS650 Addict
why is a filter needed here? it's blowing air, not sucking it in, correct?
- as the pistons go through their cycle the internal engine volume changes-this vent helps compensate for this
- if youve overfilled with oil youll get oil out here
- normal engine operation mists oil in the crankcase so as air circulates here you get an oil build up
- as the rings and cylinder wear you get more internal pressure due to blow-by
- if youve overfilled with oil youll get oil out here
- normal engine operation mists oil in the crankcase so as air circulates here you get an oil build up
- as the rings and cylinder wear you get more internal pressure due to blow-by
kent_in_kc
Heartlander
Like my life, it alternately blows and sucks. Without this when the pistons go up and down it would create a major crankcase vacuum/pressure cycle that would result in the end of the space/time continuum as we know it. And wouldn't that be bad.
Inked Monkey
XS650 Addict
Nice! Hey kent I work in smithville.
bloodthirstysystem
XS650 Addict
so having a filter just catches oil? on a stock bike, there is a hose for the breather going into the airbox? with no filter?
i do not have a filter on mine, it doesn't blow any oil. i have 2 breather valves so putting a filter i would need a t-fitting into one. if i don't have to, i won't
i do not have a filter on mine, it doesn't blow any oil. i have 2 breather valves so putting a filter i would need a t-fitting into one. if i don't have to, i won't
Inked Monkey
XS650 Addict
I just put one on there to keep crap out of the motor. Bugs and stuff. Better safe than sorry
kent_in_kc
Heartlander
Cool. Where at? I live at the south end of the Lake by Crow's Creek, off Five Corner's Road.
Inked Monkey
XS650 Addict
I work at the hospital on the mental health unit.
On the early models the breather vent emptied out over the chain, helped keep it oiled.As the years went by they changed the breather system. The epa didn't like oil blowed all over. They ended up with the breather vented into the airboxes and sucked into the engine to be burnt.
I have the single nipple with the brake valve, and the hose running down behind the engine.
I have been thinking that using the later single nipple breather with a brake booster valve, a tee and some hose to run it into the metal ends of my K&N air filters simular to the stock setup.
Or the older two nipple with two valves and run one hose to each air filter.
Maybe even an adapter between the carbs and air cleaner with a fitting to hook the hose to, even more like the stock set up.
I have the single nipple with the brake valve, and the hose running down behind the engine.
I have been thinking that using the later single nipple breather with a brake booster valve, a tee and some hose to run it into the metal ends of my K&N air filters simular to the stock setup.
Or the older two nipple with two valves and run one hose to each air filter.
Maybe even an adapter between the carbs and air cleaner with a fitting to hook the hose to, even more like the stock set up.
Tech7
XS650 Junkie
I never quite understood the one way valve, brake booster check valve. In my opinion, he crankcase needs to breathe in and out. When the pistons go up, crankcase volume increases, as they go down, crankcase volume decreases. Also, as crankcase temps increase, the gases need to be released and the inverse is true as the engine cools. I think the check valve would inhibit this 2 way breathing action. Obviously the will be some oil/mist leakage on an engine with excessive wear/blowby. But I think the valve, in either direction may cause problems with gaskets and or seals. Yamahas solution was to try and reburn these gases when introducingb them into the airbox. Just my opinion.
pyrocentric
XS650 Addict
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Yeah, I'm running brake check valves currently, but I'm having my doubts as well. I guess the idea is that the crankcase will always leak air back in, so you'll never achieve more than a mild vacuum. I'm not sure if I buy that.
