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Sportster Motorcycle Transmission, Clutch, Primary & Secondary Drive Transmission, Clutch and primary or secondary drive problems, advice, and/or how tos.

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  #21  
Old 4th July 2019
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I've got the E1 instructions right in front of me. Not sure why Barnett's kevlar would be any different. But then I'm not a fan of Barnett. Not saying they're junk but definately overpriced.

Now I was using a synthetic in the stock clutch pictured above but it's not kevlar. It was the Spectro STL 75W140.
As you can see, it shows very little wear and no sign of any slippage.

If I'm reading correctly, while Barnett says yes to Synthetic, it also says "any motorcycle specific oil" in the same sentence.

From the E1 Instructions:

"Any petroleum based, non synthetic primary oil as light weight as possible..."

"THE USE OF SYNTHETICS IS NOT RECOMMENDED AS THEY TEND TO CAUSE SLIPPAGE."


Now E1 doesn't say they WILL cause slippage but why take a chance. The Sportster primary has been running non synthetic from the factory forever and it certainly doesnt aid in better clutch performance.
But it is one reason I considered the Alto Carbonite clutch.
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Last edited by 60Gunner; 4th July 2019 at 18:53..
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  #22  
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Originally Posted by shanneba View Post
Is this what you remember?[/I]
No. Maybe I'm just going nuts in my old age. BUT there is the FACT that my Barnett kevlar clutch pack is doing just fine with "automotive" gear oils.

Anyone have the actual hard copy included with their Barnett kevlar clutch packs for our Sportsters?
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  #23  
Old 4th July 2019
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Quote:
Originally Posted by 60Gunner View Post
I've got the E1 instructions right in front of me. Not sure why Barnett's kevlar would be any different.
So what? Why would they be the same?

Quote:
Originally Posted by 60Gunner View Post
...I'm not a fan of Barnett. Not saying they're junk but definitely overpriced.
That's a valid point??? My Barnett disc pack (steels and frictions) was $126 delivered. I'm a bit old school and I've been using Barnett clutch pieces for 45+ yrs. They're still my "go to" for clutch stuff.

Maybe that's not currently fashionable...

Last edited by Tomcatt; 4th July 2019 at 20:46..
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  #24  
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Originally Posted by Tomcatt View Post
So what? Why would they be the same?


That's a valid point??? My Barnett disc pack (steels and frictions) was $126 delivered. I'm a bit old school and I've been using Barnett clutch pieces for 45+ yrs. They're still my "go to" for clutch stuff.

Maybe that's not currently fashionable...
I would think kevlar is kevlar but what do I know.

That's not a bad price. Where from? Cuz I sure can't find it that cheap. Their friction discs cost that much.
But it's about the same as the E1 kit I bought minus the spring.

I'm not an expert on clutches and read up on them at various places and got input from people here.
I was seriously leaning towards the Alto Carbonite.
The Hammer Crew, buying from them, and the discount was a big factor.
They've never led me astray.

On a side note, absolutely no squeal on lift off whatsoever.
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  #25  
Old 5th July 2019
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Gearboxes in all sorts of places have ATF in them - for example many 4x4's run ATF in the transfer case. Also many gearboxes in heavy equipment running hydraulic fluid, which is similar consistency. I think the main reason to run GL-5 is it's more stringy and stick to all the gears better when the thing is NOT running, and maybe better for extreme pressures like the ring & pinion in a rear end. Whereas an auto trans has a pump lubricating everything.

That said, I wouldn't be afraid to run ATF in a Sporty trans, or to run synthetic with clutch packs.
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  #26  
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Alto Carbonite w/ STL
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  #27  
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Quote:
Originally Posted by 60Gunner View Post
And I knew that's what Hammer Dan suggested too. I've just never cared for Harley oil in either hole.

I just changed my clutch yesterday. My old one looked like new.
Edit:
After a little looking around these are the stock plates. I can't get over how clean this clutch was for 28,000 miles.

My stock clutch pack looked brand new as well with 34k on it.
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  #28  
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That's not a bad price. Where from?
Amazon:

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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  #29  
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Originally Posted by Tomcatt View Post
I stand corrected. Pretty much the same price figuring $30ish for the spring. Amazon is usually cheaper than anywhere on most things tho.

Is that the stock spring my pic? I could've swore the PO said he upgraded something in the clutch but I could wrong. It was 3 years ago and I'm a senile old F'k.

I was expecting to see worse. Ive seen a lot worse in less miles and I'm pretty hard on it taking off like I'm drag racing. The PO was most likely the opposite tho.

Last edited by 60Gunner; 5th July 2019 at 16:59..
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Originally Posted by dieselvette View Post
Gearboxes in all sorts of places have ATF in them - for example many 4x4's run ATF in the transfer case. Also many gearboxes in heavy equipment running hydraulic fluid, which is similar consistency. I think the main reason to run GL-5 is it's more stringy and stick to all the gears better when the thing is NOT running, and maybe better for extreme pressures like the ring & pinion in a rear end. Whereas an auto trans has a pump lubricating everything.

That said, I wouldn't be afraid to run ATF in a Sporty trans, or to run synthetic with clutch packs.
I think the question is if Sportster transmissions benefit at all from the extreme pressure agents of a GL5. Synthetic is more apt to be a benefit but even a GL1 such as the SPECTRO STL fits that bill.
If GL5 was any kind of benefit why is it companies like Spectro have a Sportster specific oil in A GL1 like the Sports-Trans was? Not a GL3 or a GL4 even.
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