Small amount of oil dumping into air filter from carberator.
SOURCE: oil coming out of air fliter
Chances are your breather umbrellas are bad or your oil pump is shot. It could even be a really dirty oil filter.
SOURCE: How to drain the oil on 2007 Harley Ultra Classic?
should be on the front left of the oil pan.
ye second one on the bottom right is transmission oil.
SOURCE: oil leaking
The fact that the air filled upper portion of the shock is still holding air doesn't change the fact that the o-ring seals in the oil filled portion at the bottom of the shocks are going bad. You are better off replacing both of them soon before it affects ride comfort and handling.
SOURCE: oil blowing out through air-filter,rough
Your '98 Evo motor is what they call a "head breater" engine. This means that the crankcase ventilation is at the upper end of the heads rather than way down at the lower end of the engine like it used to be. They the first year for the "head breaters" was 1994.
Now, At the top of the heads where the rocker boxes are, there are three pieces. The lower rocker plate with the rocker arms in it, the middle piece and the upper cover. If you take the four bolts out, you'll see an umbrella valve in the middle piece of the rocker boxes. This valve is a replacable rubber piece. Over time and many times of heating up and cooling down, they can get brittle and allow a lot of blowby resulting in oil in your air filter element.
Now there is another part in the cam chest that has a lot of effect on the operation of the crankcase breather system on your bike. This part is called the "breather gear" and is located down in the cam chest to the rear of the camshaft. In you bike, the part is made of plastic if it's the original part. I have seen the teeth break off of the drive gear and the breather gear stop turning. This will screw up the "breathing cycle" on your engine and cause it to "blow oil". Usually, the oil pump locks up when this happens due to the plastic teeth getting in the oil pump but not always. If this eventually turns out to be your problem, have the mechanic or yourself install one of the new S&S reed valve type breather gear replacements. They don't turn at all and work absolutely great. The part is about a hundred dollars but it's well worth it. Solves the old broken breather gear problem that has plauged the Evo engine it's entire life.
There are no "screens" in the Evo engine other than the "tappet oil screen". Just in front of the oil pump is a screw plug that is in the engine cases itself. If you remove this plug, there is a small spring and cone shaped screen that filters the oil prior to it going to your tappets. This should be cleaned every other oil change but it has nothing to do with the oil in your breather.
Now some riders will tell you that if you allow your Harley to sit for any length of time that it will "oil sump" with you. By this, they mean that oil will seep past the check ball in your oil pump and pool up in your crankcase. When you start the engine up, oil will be blown into your oil filter. Not true on your Ultra. The bikes that will oil sump are the Sportsters, Softails, Shovelheads, or any bike that the oil tank is higher than the oil pump on the frame. On your Ultra, the oil tank is on the bottom of the transmission. Your bike will not "oil sump" unless you have a sheared key in your oil pump or the oil has somehow learned how climb. You oil tank is below your pump in other words and oil does not flow uphill.
SOURCE: why does my oil light come on when I amm idling i
I had the same problem with my 05 ultra Some filters will cause this. I use only the K&N also I have since went to a feuling super pump now it holds 55 PSI on the road and ilde at 32 psi with any filter also keep an eye on the cam chain tensioner it has been know to come apart and the cunks end up trashing the oil pump. I elimated that with a gear drive cam expensive but great for peice of mind and the bike runs so much better also these mods had realy lowered my engine temp
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