For those with pods - what to do with breather hose?

[Guest]

I had a Yamaha 650 once, and when this PCV (positive crankcase ventilation thing or whatever you call it came out, I just didn't like the idea of my engine sucking in the breather fumes from the crankcase, I thought it would screw up my carbs. So, I plugged the breather box hole and put on a new hose long enough to run under the engine case in front of the back wheel. Whatever came out of it went to the road.

 

[7981GS]

There would be... although I suspect there would be such a difference in requirements in terms of shape and size that it may not be a worthwhile business interest as that would drive production costs up dramatically...

Not if it was plastic and made in China.
Perhaps Salty Monk could have them made?
He deals with the Chinese.

Eric

 

[850GT_Rider]

run it down and point it at the top of the chain where it enters the sprocket cover. cable tie it there ...any drips go onto the chain and keep it damp depending on how much blow by you have. My motors fresh so i get very little...seems to do the job though

What's a chain?

 

[saffa]

What's a chain?

its the superior replacement to one of those naff shaft type things

 

[Guest]

Not if it was plastic and made in China.
Perhaps Salty Monk could have them made?
He deals with the Chinese.

Eric

Yes good point... although making it out of plastic means it wouldn't be much of a design feature...

This whole thread has got me thinking now... plus the fact that I definitely have a small amount of blow by that ends up on the battery, which means it will end up on my battery box cover once it's finished too...

 

[JimmyR]

Hmmm... I have a small K+N filter. I'll work something out. Thanks guys!

 

[koolaid_kid]

JimmyR, if you run it straight up, the blowby will go up, hit the filter, stop, and eventually run back down into the engine. No dripping on the ground, no dripping on the chain , and no need for a catch can. Just my observations and experience, since that is what I do. Best of luck.

 

[salty_monk]

Not if it was plastic and made in China.
Perhaps Salty Monk could have them made?
He deals with the Chinese.

Eric

We'd have to get together and find a few grand for tooling first...

 

[Guest]

We'd have to get together and find a few grand for tooling first...

Tooling? I can give you that for free! Oh wait, you're not talking about self confessions here are you?

 

[7981GS]

I'm certain that some kind of container that they sell at a Dollar store could be converted for use for very little money.
Especially in China.
They might cost what, .50 each to make tops?
With a retail price of say $10.00?

Eric

 

[JimmyR]

Well that makes sense because that's what the weird wire mesh stuff in the breather is supposed to do anyway isn't it? Catch the oil and let it drain back? Anyway I have no chain to drip on - it's a G!

 

[Guest]

Well that makes sense because that's what the weird wire mesh stuff in the breather is supposed to do anyway isn't it? Catch the oil and let it drain back? Anyway I have no chain to drip on - it's a G!

Yup, that's what it's there for!

 

[Homie]

On my blue 1100E I was thinking of using one of the frame cradle tubes as a collector. A similar principle to what the modern race bikes are doing - using the frame rail as a conduit for coolant and/or oil. I would need to drill and tap a small hole for a nipple fitting for the breather hose and another hole for a drain plug or petcock. Additionally, to vent the pressure pulses from the crankcase, a small vent hole would have to be drilled somewhere above the hole for the nipple fitting. Think it would make for a very clean solution to what do with the breather hose. Got the bike up on the lift now and partially disassembled for a top-end rebuild so I was thinking of doing this mod while it was apart.

 

[Guest]

On my blue 1100E I was thinking of using one of the frame cradle tubes as a collector. A similar principle to what the modern race bikes are doing - using the frame rail as a conduit for coolant and/or oil. I would need to drill and tap a small hole for a nipple fitting for the breather hose and another hole for a drain plug or petcock. Additionally, to vent the pressure pulses from the crankcase, a small vent hole would have to be drilled somewhere above the hole for the nipple fitting. Think it would make for a very clean solution to what do with the breather hose. Got the bike up on the lift now and partially disassembled for a top-end rebuild so I was thinking of doing this mod while it was apart.

You'll have to share pic's of it, that sounds like a neat idea...

 

[TheCafeKid]

One could easily make something similar to the picture in a smaller size with a few bucks worth of PVC and threaded caps....

 

[Guest]

One could easily make something similar to the picture in a smaller size with a few bucks worth of PVC and threaded caps....

Yes indeed... in fact I have left over PVC from making the valve spring compressor Steve-style and that could in theory easily be mounted on one of the frame down tubes...

I need to stop thinking about this or it'll become yet another little add-on to the 450

 

[koolaid_kid]

If you do one of those, be sure and vent it.

 

[keman]

The "correct" thing to do is to run it to a small catch tank that has a side connection for the line & a top vent for fumes to escape...

Something like this... but good luck finding one small enough. I have mine routed under the seat to a K&N style filter that is held in a small pot (actually a paint can lid). I put towel in the pot & replace it every 6 months or so.

Small diesel water seperator filter should do the trick and be small enough if you get one from an diesel VW Rabbit or a Jetta... I am thinking a little more Steampunkish.... Science beaker with a two hole rubber stopper, and some nice clamps to hold it in place, tuck a bit of Stainless steel wool inside the beaker... Or even a section of copper pipe with a cap on the bottom and a filter on the top, solder in a nipple for the breather hose and clamp it to the frame upright.

 

[TheCafeKid]

If you do one of those, be sure and vent it.

Indeed. IMO it should, and could, look just like the picture above, but made from PVC. You could then paint it whatever colour you liked, and pretty much mount it anywhere. On an 1100E, if you're running pods, there's plenty of room under the seat.
Check/empty it whenever you clean your chain, (400-600 miles kids! You're nice modern chain and sprockets will last a loooooong time if you maintain it!!) or if you want to be super slick for you old school chopper/bobber/cafe builders, route a hose out the bottom and out over your drive chain. (By the way, I honestly don't recommend this. In the old days of roller chains, a chain oiler would be handy, but todays modern chains don't need it, and in fact, over-lubrication is a cause of pre-mature chain wear. Excess lube/wax picks up grit and grime, and that acts as a million tiny files working on the pins and plates...)

If you're not suffering from excessive blowby, you shouldnt have to dump it very often, but it needs to be vented, cause the cases need to breathe...

 

[Guest]

I just installed a Hayden Krank vent plus on the breather with a K&N filter. It seems to me that the old Zooks like 3 to 5 lbs. of vacuum in the crank case. It immediately smoothed out the idle and it seems to, "by the seat of my pants", have more low end grunt. I just did the Maiden Hayden run this afternoon and haven't had time to really check it out. As it was explained to me, by Hayden, The real benefit is at high rpm where the pulses in and out of the breather become so fast that it effectively sets up an air dam allowing a positive pressure to build up in the crankcase. The Krank Vent Plus is ported so the umbrella valve that is only one way (out) can only produce a 3 to 5 lb vacuum, but it is consistent over the rpm range. I have seen it work on a early Harly evolution motor, with blown base gaskets that immediately stop leaking with the introduction of the Krank Vent. I'm looking forward to some high speed runs, but that isn't in the cards for the daily commute. I'll have to check out the schedules at Summit Point for the high speed tests.