oil in intake
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Tourer
Joined: Nov 2009
Posts: 311
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From: nfl
oil in intake
just bought a 07 fxd. and im a big fan of tinkering... i took my intake apart just to see what it looks like. i notice what seems to me like a quite a bit of oil in my throttle body and a very moist intake filter. what seem intersting to me is there are no pcv valves. is this a normal thing? i cant imagine a combustion engine designed to run with oil sucking in the intake. im just looking for any input to cure my curiosity. thanks.
Tourer
Joined: Mar 2007
Posts: 311
Likes: 1
From: Seattle, WA
It's normal. The cylinder breather tubes route back into the air cleaner. Several guys on this site have posted DIY projects about re-routing them into a small catch can, etc. Mudpuddle has a great write-up. I never bothered doing that myself, but it does annoy me knowing that crud is getting sucked back into my combustion chambers.
Cheers,
J
Cheers,
J
Elite HDF Member
Joined: May 2008
Posts: 4,579
Likes: 10
From: S.E. MO
It is normal to see but if you are getting very much then it also has to much oil in it.
When I do mine (fluid change) I dont fill mine all the way to the top of the fill mark to prevent the blo-by.
As to why its designed to do that its another EPA thing
When I do mine (fluid change) I dont fill mine all the way to the top of the fill mark to prevent the blo-by.
As to why its designed to do that its another EPA thing
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Tourer
Joined: Nov 2009
Posts: 311
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From: nfl
thanks for the quick response compgeek... im gonna look into mudpuddles write up. ive also poked around in other various parts of hdf and found that some guys are saying a hi-flow intake and running the oil on the low side is a fairly quick fix. im all about grabbin some extra ponys but not too fond of the idea about running my oil level on the low side.
Elite HDF Member
Joined: May 2008
Posts: 4,579
Likes: 10
From: S.E. MO
thanks for the quick response compgeek... im gonna look into mudpuddles write up. ive also poked around in other various parts of hdf and found that some guys are saying a hi-flow intake and running the oil on the low side is a fairly quick fix. im all about grabbin some extra ponys but not too fond of the idea about running my oil level on the low side.
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Tourer
Joined: Nov 2009
Posts: 311
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From: nfl
i see what your saying bbreck... i havent had to privilege or servicing my bike yet. (bought it last month with 2500mls on it and i just hit 4000mls) but i guess a lil fluid change is a good excuse to get back in the garage.
Tourer
Joined: Mar 2007
Posts: 311
Likes: 1
From: Seattle, WA
Helpful hint in the event you (or previous owner) over-filled the oil: Use a turkey baster to draw out a little bit at a time through the top fill hole. Easier, cheaper, cleaner and faster than guessing the right amount to drain through the drain plug. Check the dipstick after each draw until you're happy with the level.
You mentioned a high-flow air cleaner? If you have one installed on your bike (whether it be a K&N or Screamin' Eagle, etc), most of the filter elements incorporate a coating of light weight oil to help trap dirt/dust/debris. If you do have a hi-flow on your scoot, most brands need to be oiled. Check the brand or contact the person you bought it from.
You mentioned a high-flow air cleaner? If you have one installed on your bike (whether it be a K&N or Screamin' Eagle, etc), most of the filter elements incorporate a coating of light weight oil to help trap dirt/dust/debris. If you do have a hi-flow on your scoot, most brands need to be oiled. Check the brand or contact the person you bought it from.
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Tourer
Joined: Nov 2009
Posts: 311
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From: nfl
im very fimliar with the turkey baster trick. ive used it many times after brake jobs. i do not have a hi-flow intake on my bike but i am aware that you should keep the filter element lightly oiled.
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Banned
Joined: Mar 2007
Posts: 3,706
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From: Woodstock, Ont , Can
Never gave this oil in the breather much thought until I recently tore into my 07 96". Have been running the SE heavy breather for two years. While it don't soak the filter, the oil is channelled directly into the tb. The carbon build up was unreal for the 20000 kilometers on it. Couldn't figure out why I had to back the timing off to stop pinging mid season. Compression had to be way up with that much carbon. Will be routing the breather lines under the bike this time. Always ran the oil level a touch low, but those high rpm runs will cause some carry over just the same.
Ron
Ron