I will preface this by saying, I did not have any issues with the bike whatsoever. I just did it to see if I could come up with, a cost effective alternative to the crazy priced " pro" fixes.spending
I picked up a used dipstick on eBay, a piece of 3/8 hose,1/8 inch x 3/8 hose barb and a 1/8 NPT to 8MM Paintball Quick-Disconnect Adapter, Stainless Steel Male & Female ,and a breather filter off amazon. Drilled and tapped the the dipstick cover then separated the cover from the stick and epoxied it back together to seal it up. Installed quick disconnect and hose barb. Ran the 3/8 hose up the frame rail and secured the breather filter up over the rear wheel. (oil will never make that far anyway)
Total parts cost: About $38:00and a half hour of my time. I keep the stock dipstick in my saddlebag in the event of an issue,(not to check the oil, as the quick disconnect easily allows for that) but as of yet, that has not happened. Didn't notice any performance change either. But not a problem, I can remove it in about 3 minutes if I want to. And ,no,there is no umbrella valve. I don't see the point. I used work on diesel trucks and the older trucks ( pre epa BS) and they used to come new with a 1 inch or larger crankcase breather that used to vent right to the air.
Hey Jake, when you say "oil will never make it that far anyway", does that mean you're anticipating the re-constitued oil (from mist vapor), to stay in the hosing indefinitely? If so what happens when the line, becomes full? Or does the oil drip back down into the filler spout?
Is this a means of lessening the amount of venting at the breathers?
Can you by chance post a picture of the entire, finished setup off the bike?
Hey Jake, when you say "oil will never make it that far anyway", does that mean you're anticipating the re-constitued oil (from mist vapor), to stay in the hosing indefinitely? If so what happens when the line, becomes full? Or does the oil drip back down into the filler spout?
Is this a means of lessening the amount of venting at the breathers?
Can you by chance post a picture of the entire, finished setup off the bike?
Hey Jake, when you say "oil will never make it that far anyway", does that mean you're anticipating the re-constitued oil (from mist vapor), to stay in the hosing indefinitely? If so what happens when the line, becomes full? Or does the oil drip back down into the filler spout?
Is this a means of lessening the amount of venting at the breathers?
Can you by chance post a picture of the entire, finished setup off the bike?
The theory is, that the vent relieves some of the pressure and vacuum( negative pressure) in the crankcase/oil pan/cam chest, that is caused by two reciprocating pistons on a common crank pin. Along with ring blow by. There is a lot going on in a relatively small area, and all that air needs to go somewhere. As far as the oil migrating into the hose, I meant that because the hose is routed upwards, as high as the bottom of the rear fender, you should never see any solid oil coming out of the breather. I suppose if the engine is tired and or you have serious blow by issues, you may get mist to make it that far. But then gravity would play a role in this as well. Keep in mind, as the pistons change direction they also produce pressure on the down stroke, and a negative pressure on the upstroke( less any blow by) so its more like a push pull thing. If you listen to the hose you can hear the engine, for lack of a better term, breath in and out. I guess by reducing the case pressure and negative pressure, you could take some stress off gaskets and seals.Also the oil pump scavenging wouldnt be trying to deal with all those fluctuating differences as well. I doubt there is any power gains, but hey, maybe there is.
When I get a few minutes I will put some pictures.
Any testimonies out there on their Ventilator? Seems like a very clean way to do this. More expensive than what Jake came up with up above but I like the idea of a fitting that isn't epoxied, fastening into the filler tube. Would like to hear from others who've done this and found that the breathers are no longer dumping oil into the intake thought.
The theory is, that the vent relieves some of the pressure and vacuum( negative pressure) in the crankcase/oil pan/cam chest, that is caused by two reciprocating pistons on a common crank pin. Along with ring blow by. There is a lot going on in a relatively small area, and all that air needs to go somewhere. As far as the oil migrating into the hose, I meant that because the hose is routed upwards, as high as the bottom of the rear fender, you should never see any solid oil coming out of the breather. I suppose if the engine is tired and or you have serious blow by issues, you may get mist to make it that far. But then gravity would play a role in this as well. Keep in mind, as the pistons change direction they also produce pressure on the down stroke, and a negative pressure on the upstroke( less any blow by) so its more like a push pull thing. If you listen to the hose you can hear the engine, for lack of a better term, breath in and out. I guess by reducing the case pressure and negative pressure, you could take some stress off gaskets and seals.Also the oil pump scavenging wouldnt be trying to deal with all those fluctuating differences as well. I doubt there is any power gains, but hey, maybe there is.
When I get a few minutes I will put some pictures.
Thanks Jake. Three things I'm curious about, first is whether or not this reduces the oil being pushed into the hose to the point that it would not build up in the hose. Second is the epoxy used to reseal the dipstick cap to the dipstick. If that failed you could end up with the dipstick in the pan, as well as a whole bunch of oil escaping. And third is whether you've seen a big reduction in the amount of oil going through the factory breathers and into the air filter/intake.
Thanks Jake. Three things I'm curious about, first is whether or not this reduces the oil being pushed into the hose to the point that it would not build up in the hose. Second is the epoxy used to reseal the dipstick cap to the dipstick. If that failed you could end up with the dipstick in the pan, as well as a whole bunch of oil escaping. And third is whether you've seen a big reduction in the amount of oil going through the factory breathers and into the air filter/intake.
I did watch them. Very short and while they would seem to indicate they would help, it would be good to hear some first-hand experience. For example if the cure for sumping was as "simple" as venting the pan through the filler tube I think HD would have moved toward that rather than 3 years of trial and error with oil pumps.
11-05-2019, 09:22 PM
