That looks like a neat job. My guess is that care must be taken with the hose routing to make sure it stays unmelted.

I've never had a problem with excess oil leaking from the air cleaner. This is sometimes the result of overfilling the oil tank.

 

I've never had a problem with excess oil leaking from the air cleaner. This is sometimes the result of overfilling the oil tank.

Yeah after I had already did this I read that the oil level in the manual was a misprint. I should actually be filling it between 1/4 and 1/2 on the dipstick with the oil hot. I've also read that the umbrella valves could go bad and cause excessive blow by but this bike only has a few thousand miles on it so that shouldn't be the prob.

 

I used clear nylon so I could see what's going on. So far the only issue I've had with heat was right at the two crankcase breathers (not sure the correct name) where I have the hoses clamped, that's why I have the two black sections of high temp fuel lines the clear nylon hose would get soft, not meant for that kind of heat.

I didn't plug the exit of the fuel filter so it could still breath and oddly enough it's not leaking oil on the ground either so its working out. Hopefully the paper inside the filter is soaking up any oil and if I ever see a spot of oil on the ground I can just get a new filter. When I find my sweet spot for the oil level I may not have to even worry about it.

 

I never had oil film on the side of the bike. But the mist coming out of the heads that was routed into the air filter was not something I felt was good for the air filter in general. I commend you on your idea just don't care for the clear plastic hose and not sure why you have a filter. I went a different route and used steel braided hose and routed it underneath the bike. That way the tiny bit of fluid coming out just slips out unnoticed. Like the old breathers that cars had back in the early days.

Hate to disagree Badlands but this is not the result of overly high RPM's or too much oil in the tank. It just occurs from normal engine operation. The mist being found in the a/c, and now in the clear plastic tube, is just the result of a portion of the exhaust being admitted into the intake portion of the engine. Purpose being to re-burn a percentage of the exhaust gases thereby producing less emissions.

If you were to plug the end of the fuel filter it would have no effect on the engine breathing, it just would not let the fluid out that you are trying to get rid of. That is not a breather in the sense that it takes air in, it does not.

 

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But, on the other hand, when the crank, or valve cover, line was placed by the factory, it was with the idea to pull some gases from the cover area so the mist would not just circulate until it would finally leave a deposit somewhere inside. The vacuum from the air cleaner area pulls that oil saturated air out.

True, the bike runs best on clean, cool air, but any fuel mixture setup (carbs or f.i.) should have some heat/mixture regulator that anticipates the gases from beyond the air cleaner. Even so, the actual amount of air coming through should be a tiny fraction of what comes through the air cleaner.

If you run your outlet some other place, say under your motor, you will not have the suction, plus you will have oil residue spraying onto your bike somewhere unless you change or clean your filter every couple of days. This can be noticed by guys that have placed their small, end-of-line filters near chrome or a bag where they can see the mist, so we know it's there. If you just have a hose ending there with no filter, then anything coming out of the line goes out. If it's underneath the bike, then that oil will coat the bottom of the motor, swing arm, rear brake, rear wheel, or drive belt. It won't do this immediately, of course, but there will be a buildup of the oily film that will attract dirt particles. It wouldn't be so bad if you used a pressure washer to clean underneath every couple of rides--most people wouldn't do that--practically speaking. I don't, and I have my own pressure washer!

As to the cause, probably the main cause is overfilling the oil reservoir. This can happen when the oil is changed, or during hot running when the oil expands, or fast use and foaming of the oil. (By the way, this is where using a cheap oil that doesn't resist this foaming will show up.) Think about it, if the oil overflows, on some (maybe all, I don't know) bikes, it will drain into the valve cover where it may be picked up by the vent hose and sucked to the air filter housing. Where do you think that oil is coming from? It's not dripping out of your gas tank!

So, as someone has mentioned, it is probably best for most of us to keep our oil reservoir, or level, closer to minimum than maximum so as to handle the expansion.

That's about it. If anyone has other ideas, feel free to disagree with me somewhere here.

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I disagree. I have no oil spaying anywhere. the oil level is right where it should be and my air filter is nice and dry. Nothing under the bike either. You may get some oil due to over filling the tank but it would take a good amount of oil not just a tad. This is what I run, works great