FXR2- I don't know if the blowby is good or bad for the engine, I just don't like the mess. I have tried the paper towel in the air cleaner- it works but a tampon works better. I used a Maxi-pad (with wings, of course) for a while, it had built in tape to hold it in place. Eventually though, whatever was in the air cleaner would blow out. No telling what the driver of the car behind me thought when a oil-soaked pad hit his windshield... Anyway, here is my solution:
í97 Softail, typical EVO head breather venting into the back of a Mik HSR42 air breather. Figured I would try setting up a catch can. I had most of this stuff, but still took a trip to Home Despair to collect all the parts. As you can see it about $10 worth of PVC and brass fittings, and a few feet of tubing:
The brass Tee-fitting in the first picture ties the dual breathers together, then feeds the assembly in the next picture. Ignore the brass elbow, it snuck into the picture and isnít necessary. There are 2 threaded oil nipples used, I drilled a hole for each in the PVC, tapped the holes with a pipe tap and screwed the fittings in. Added a vent hose to the top oil nipple, assembled it with PVC cement, and hit it with a black rattle can.
Starting from the right- the breather vent from the heads feeds into the pipe nipple. The nipple at the top with the short piece of tubing attached vents the gas and vapor. The unit itself is a reservoir that catches and collects oil. At the far left, there is a threaded PVC plug to drain it when necessary. If it sumps enough to fill the reservoir, it will blow out the top.
Here is a shot of it installed and zip-tied to the frame:
I angled it slightly down so the oil would collect at the drain plug. It is not completely out of sight, after I use it for a while and see how much oil it collects I may make a smaller one and try to hide it better.