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Lubrication and Lubricants You guessed. Here is where everyone can argue over oil.

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  #371  
Old 31st May 2018
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Quote:
Originally Posted by Bone View Post
Google suggests you're right, 5 qts and one hole in the vrod supplies everything.


Wonder if Street is the same. Edit, looks like it is, though the volume is lower.
is the street a dry sump?

I think, and I say I think.....the reason we do not share the oil with the tranny is because we have a dry sump.

mc trannies traditionally use the gears to throw oil up and contact to each other to spread oil around. It is a vary simple and effective way to spread the oil in a system such as a geared transmission, engines need pumps to get oil up to the top end, once there the engine oil is directed where to drain by design of oil passages, plus they also shoot oil like under pistons to help cool them.

so I wonder if the Street engine is a dry sump. if it is a wet sump then there is no reason for separate oils as long as the tranny is in the same case.
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  #372  
Old 1st June 2018
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Quote:
Originally Posted by jammantoo View Post
is the street a dry sump?

I think, and I say I think.....the reason we do not share the oil with the tranny is because we have a dry sump.

mc trannies traditionally use the gears to throw oil up and contact to each other to spread oil around. It is a vary simple and effective way to spread the oil in a system such as a geared transmission, engines need pumps to get oil up to the top end, once there the engine oil is directed where to drain by design of oil passages, plus they also shoot oil like under pistons to help cool them.

so I wonder if the Street engine is a dry sump. if it is a wet sump then there is no reason for separate oils as long as the tranny is in the same case.
I didn't look that close, but assume both the Vrod and Street are probably wet sump.

And yes most manual transmissions are splash lubricated, but there are exceptions. The late-model Guzzi smallblocks with the 6-spds come to mind. They're wet sump motors with dry automotive style clutch and a separate PRESSURIZED transmission with it's own oil source and pump.

But your logic might be why Harley initially went with separate engine and drive fluids on most of their bikes.
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  #373  
Old 1st June 2018
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I owned a Street 750. They are Wet sump. Having only 1 drain plug for the Oil. I thought it was better. Since the Oil is getting Filtered.
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  #374  
Old 1st June 2018
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Early Sportsters had a dry clutch as did the big Harleys. I believe the big bikes went to wet clutch around 1984. They had some oil in the primary for the chain only. My old 1964 Pan had a total loss primary chain oiler. There was a hole in the bottom of the primary cover as I recall.
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  #375  
Old 2nd June 2018
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Penrite V-Twin 20W-50 PAO Ester for the HD
Nulon 10W-40 Full Synthetic for my 1MZ-FE Camry
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  #376  
Old 4 Weeks Ago
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re correct, my 63 Pan is like that.

Part of the old saying Harley's mark there territory is not because they leaked oil, it is because they had systems that were leaks on purpose, like chain oilers.
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  #377  
Old 4 Weeks Ago
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Well since it was dug up, I'll chime in. No synthetic here. Especially not in the primary.
Valvoline vr1 20w50 racing oil. Drag Specialties Gear and Chaincase oil in the primary. Equivalent to HDs Sports-Trans no longer available.
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  #378  
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Red line here. No problems at 35k on her
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