who's been having to add transmission fluid?

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#901

08-03-2017, 03:17 PM

Max Headflow

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Quote:

Originally Posted by TomcatCV62

so, if the crank case vents into the transmission, first year ever, is it possible at high RPM's that the pressure in the trans builds up to high for the tranny vent, and spills over to the primary? Also, if the pushrod spins, it could carry fluids with it as well, but that is an old design. I do know this, it is against the law to vent any oil reservoir to the atmosphere according to our friends at the EPA. I wonder what kind of pressure is on the transmission at high RPM's. But then how does the pressure and oil carry over to the primary. Maybe it recirculates back to the transmission. Steve, is the oil level lower in the primary than the tranny, under normal conditions? If it is, that has to be the low spot on the bike....

The primary vents to the tranny, not the motor.. Motor vents to the AC.

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14GuineaPig (08-03-2017)

#902

08-03-2017, 04:01 PM

Steve Cole

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Quote:

Originally Posted by TomcatCV62

First off, nowhere did I talk about the crankcase. I've only talked about the Primary and Transmission. So lets just stick with the Primary and Transmission and not try and confuse the issue more than it already is. Each has an oil level that is in its own compartment and lower than the pushrod and mainshaft height. What kind of pressure is in one compartment should be in the other, as the hole in the mainshaft connects them both together. The vent that is atop the transmission should allow any pressure out there, unless it is to great of flow. I tested with the oil fill removed so that adds a new ~3/4" opening and it made no difference.

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14GuineaPig (08-03-2017)

#903

08-03-2017, 04:39 PM

Steel Wheels

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No difference? Wow. This IS getting ugly. 'Preciate all you're doing to figure this one out, Mr. Cole.

Between you and HD a solution won't be long in coming, hopefully.

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#904

08-03-2017, 04:42 PM

14GuineaPig

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Quote:

Originally Posted by TomcatCV62

Found this on the internet... it is interesting.... what do you think?and… wait for it… crankcase venting to the transmission.

The article is not accurate. The crankcase vents to the air filter. The breather valves in the heads are new but it still vents to the air filter the same way the Evos & TCs did.

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TomcatCV62 (08-03-2017)

#905

08-03-2017, 05:12 PM

Max Headflow

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Quote:

Originally Posted by 14GuineaPig

The article is not accurate. The crankcase vents to the air filter. The breather valves in the heads are new but it still vents to the air filter the same way the Evos & TCs did.

Except that the early EVOs vented from the cam case..

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14GuineaPig (08-03-2017)

#906

08-03-2017, 05:44 PM

GTK

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[QUOTE=Max Headflow;

Look at the chrome cover on the top of the tranny.[/QUOTE]

I don't have a chrome trans cover on my M8 and I haven't noticed any M8's that have one,maybe a CVO,not sure.

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