Turning the pollution cap into a crankcase vent

wireman wrote: At the same time like Ive said before if you have to start adding lots of extra venting just to keep oil from blowing out of a motor its time to do a leak down test to make sure youre not just blowing everything past worn rings or a worn bore.
On a high rpm racing engine thats spinning its way down the track at 10,000 rpms its understandable that things getting stirred up internally pretty violently,but on the typical street bike thats just being jumped on once in a while its not such a big issue.
If youve got a streetbike thats blowing gaskets out to vent itself and the stock crankcase vent isnt clogged up youve got internal issues and the extra venting is just a band aid.

I agree. I think turbo applications may be different though, correct?
Wayne

kzz1king wrote:

wireman wrote: At the same time like Ive said before if you have to start adding lots of extra venting just to keep oil from blowing out of a motor its time to do a leak down test to make sure youre not just blowing everything past worn rings or a worn bore.
On a high rpm racing engine thats spinning its way down the track at 10,000 rpms its understandable that things getting stirred up internally pretty violently,but on the typical street bike thats just being jumped on once in a while its not such a big issue.
If youve got a streetbike thats blowing gaskets out to vent itself and the stock crankcase vent isnt clogged up youve got internal issues and the extra venting is just a band aid.

I agree. I think turbo applications may be different though, correct?
Wayne

The turbo is force feeding the cumbustion chamber which puts more load on the rings which in turn causes some extra blow by if the rings cant handle it all.
But if it gets to the point where its blowing more past the rings than youre gaining its time to look at differant options as far as the finish on cylinder wall or the rings,Ive got a few sets of pistons laying around from higher end motors that are "gas ported" I believe the term is called where they drill holes in the ring land of the pistons to allow some of the cylinder/combustion pressure to come in behind the rings to force them against the cylinder walls to help them seal better .
It all depends on your situation and motor condition

kzz1king wrote:

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Whats that across bottem of the cap?

That is a baffle to prevent oil from being slung up the pipe. Not sure it was needed but I know the time I rode 30 some miles on one of my KZ's with the cap sitting on the case my leg got a little oily
Wayne

No I mean whats it made of?

Patton wrote:

kzz1king wrote: I thought I already asked this but do not see it. Does additional venting from the bottom end negate having to vent the top end? I Vented through fill plug on mine with no problems.
Wayne

Am thinking there's no separate venting for the bottom end and top end, because they're connected by the cam chain tunnel between the crankcase and cam area.

Good Fortune!

If you look inside the airbox the oil breather is right underneath the clean air hose for the emissions.

donthaveakawman wrote:

Patton wrote:

kzz1king wrote: I thought I already asked this but do not see it. Does additional venting from the bottom end negate having to vent the top end? I Vented through fill plug on mine with no problems.
Wayne

Am thinking there's no separate venting for the bottom end and top end, because they're connected by the cam chain tunnel between the crankcase and cam area.

Good Fortune!

If you look inside the airbox the oil breather is right underneath the clean air hose for the emissions.

oopsies! :sick:

wireman wrote:

donthaveakawman wrote:

Patton wrote:

kzz1king wrote: I thought I already asked this but do not see it. Does additional venting from the bottom end negate having to vent the top end? I Vented through fill plug on mine with no problems.
Wayne

Am thinking there's no separate venting for the bottom end and top end, because they're connected by the cam chain tunnel between the crankcase and cam area.

Good Fortune!

If you look inside the airbox the oil breather is right underneath the clean air hose for the emissions.

The emissions system hoses are pulling unburned fuel vapors from exhuast ports of motor,not venting crankcase pressure in their stock form

The velocity of the exhaust gasses running through the headers creates a vacuum when the valve closes. then pulls the reed valve to let airbox air in. :pinch:

wireman wrote: No I mean whats it made of?

Some crap I saved for some unknown purpose but I knew I would need it someday. My garage is full of stuff like that! Some sort thin anodized aluminum.
Wayne

donthaveakawman wrote:

wireman wrote:

donthaveakawman wrote:

Patton wrote:

kzz1king wrote: I thought I already asked this but do not see it. Does additional venting from the bottom end negate having to vent the top end? I Vented through fill plug on mine with no problems.
Wayne

Am thinking there's no separate venting for the bottom end and top end, because they're connected by the cam chain tunnel between the crankcase and cam area.

Good Fortune!

If you look inside the airbox the oil breather is right underneath the clean air hose for the emissions.

The emissions system hoses are pulling unburned fuel vapors from exhuast ports of motor,not venting crankcase pressure in their stock form

no, the velocity of the exhaust gasses running through the headers creates a vacuum when the valve closes. then pulls the reed valve to let airbox air in. :pinch:

Yes youre correct

donthaveakawman wrote:

Patton wrote:

kzz1king wrote: I thought I was homophobic enough, I already asked this but do not see it. Does additional venting from the bottom end negate having to vent the top end? I Vented through fill plug on mine with no problems.
Wayne

Am thinking there's no separate venting for the bottom end and top end, because they're connected by the cam chain tunnel between the crankcase and cam area.

Good Fortune!

If you look inside the airbox the oil breather is right underneath the clean air hose for the emissions.

I just don't understand sometimes :evil: .

How about something like this in the header past collector?