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Technical Resource Discussion / Re: best/recommended oil for a super X
« Last post by Donkey Hotey on November 29, 2022, 02:11:46 PM »
Wow. Again: very sorry to hear of these problems. I know this sounds unbelievable but, I would remove the fuel pump again and look at the O-rings. What you described is exactly what one of mine did a few months ago. I left home and it ran fine. As the miles passed, it ran worse and worse until I almost did not make it home. One of the O rings had gone bad on the regulator assembly.

If you hook up a pressure gauge to the outlet port on the tank, you should be able to verify the fuel pressure.

Where did you get the replacement O ring for your regulator? Was that local or did it come from Atlantic E-H? The reason I ask is the material for the O rings is important.


Silicone O-rings will fail very quickly in gasoline. Nitrile or Polyurethane O rings (often called Buna N) are a little better but, also fail in gasoline. Alcohol in the gasoline is also very hard on them.

Fluoroelastomer O rings are often sold under the trade brand Viton. They are what you want for use in gasoline. Even Viton O-rings only last 4-5 years for me.

I would check the fuel pressure. If the pressure is low, I would replace all four O rings on the regulator assembly and make sure they're Viton material.
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Technical Resource Discussion / Re: best/recommended oil for a super X
« Last post by 5ehsx on November 28, 2022, 05:14:17 PM »
Yes, stator, rotor and fuel pump are ok, so my Super X is back on the road again or actually was. Last saturday I was riding over 150 miles at about 50F, glad as a spring bird; but some miles from home my bike started not to run good with missfiring; worse and worse it took me home but no more.
Despite the oil (a half synthetic) just had some 3-400 miles on, I saw it became very poor both in quantity and quality, so I thought the engine problems was due to the oil, maybe no enough pressure to the valves and so.
I finally chose a full synthetic Castrol 20w50 but for the moment it doesn't seem have solved my problems, the engine still sounds bad, like working only with one cylinder, but both are warm, so both get fuel and sparks.
In some days I will investigate better and I'm probably back to you.
Thanks!
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Technical Resource Discussion / Re: best/recommended oil for a super X
« Last post by Donkey Hotey on November 27, 2022, 05:42:56 PM »
Hey Luca! Does this mean you're putting your bike back together with a new stator?

Everyone loves a good oil argument. From the recent research I have done:

Synthetic car oils used to be okay for our bikes because--they were similar enough in construction. That was 20+ years ago. After watching a number of Amsoil videos on YouTube, I now understand what changed.

Car engines used to have flat tappet lifters, just like our bikes: the cam rubbed on a flat surface to open each valve. To combat the wear they used to use additives like ZDDP (link here if you're bored). The issue is that this additive is bad for catalytic converters.


Car engines have slowly migrated away from flat tappet lifters and gone to rollers. As that has happened, the newer oils reduced or eliminated that additive. This added life to the catalytic converters and worked fine (as long as you have roller lifters).

And that's why we need to use motorcycle-specific oil or diesel-rated oil designed for flat lifters. I would also guess that the ZDDP is probably good for our motorcycles because our transmission shares the oil supply. Wear on the gears is sliding, much like the cams so my guess is it would help.

(I typed all of that so we don't start an oil war on here  ;D )

I haven't used the Spectro but, it's probably a very good oil. I don't know what is available to you in Italy. I use Mobil One Synthetic 20W-50 V-Twin oil because it's locally available and meets all the things I want from an oil.

With all that said, if I were rich and not lazy, I would probably start using Amsoil. Even if their oil isn't available, these videos are a good education into all that goes into making and evaluating motor oil:

https://www.youtube.com/watch?v=-ZYSrLI34FA

https://www.youtube.com/watch?v=9rEGIB2F8qA

https://www.youtube.com/watch?v=NuX1tWwLjy8

https://www.youtube.com/watch?v=mnseEdDSVDM

If you're not familiar with Gale Banks, he is an engineer's engineer. The man is not only a car performance legend but, also a gifted and generous mentor. He explains all the logic behind what he preaches. Yes, I've watched all four of those videos. He expands on the idea of all these different additives and what each does for your engine. I knew some of it already but, Gale does an amazing job of bringing it all together, with all of the background.

Yes, Spectro oil is probably good for your Super X.
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Technical Resource Discussion / Re: best/recommended oil for a super X
« Last post by 5ehsx on November 27, 2022, 08:17:28 AM »
Hi there,
anyone tryed Spectro? See attachfile, they say US made and special for V twins...
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Non-Technical Discussion / Re: Super charged super x?
« Last post by wytfut on November 22, 2022, 09:43:39 AM »
Very nice price for a very cool piece of X history....   
Wish it were mine...
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Non-Technical Discussion / Re: Hi! I'm a newbie here
« Last post by wytfut on November 22, 2022, 09:42:10 AM »
Voo Doo child list on this site for sale is a heavily customed X. I knew the owner via email before he passed many years ago. He built this one and the "buffaloe" bike.
From conversations and all the photos I've seen of both of these bikes, they were very well built.... gorgeous.
I'm hoping the current owner gets more money for voodoo child than market value. I see he's asking #17500, which is way hi for market.
Bruce
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Non-Technical Discussion / Re: Hi! I'm a newbie here
« Last post by Junker on October 31, 2022, 03:11:56 PM »
I would very much like to acquire one of each as well. I have multiples in a few colors but lots of holes. And I don't know much about any special/unique bikes.

However I believe I've found the right place.

Thank you guys for all the information!
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Non-Technical Discussion / Re: Super charged super x?
« Last post by Junker on October 31, 2022, 03:06:30 PM »
I got it for 800$ plus 200$ to ship it.
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Non-Technical Discussion / Re: Super charged super x?
« Last post by wytfut on October 29, 2022, 11:11:11 AM »
If I could be so nosey....
What kind of money did that go for?
very nice piece of X history for sure.
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Non-Technical Discussion / Re: Super charged super x?
« Last post by wytfut on October 29, 2022, 11:07:12 AM »
I was dealing with Bobby with parts when he bought that.
The guy that made that blower, was the same guy that built Jesse James blowers.
I don't know if bobby ever got it to run, but was hinting that this guy was going to build him several more blowers.... but it never happened.

The pictures I saw of it, way back when, it was near as refined (finished looking) as at this point. He was a bit odd about it, as he refused to say who's bike he built it for.
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