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HD Fork oil Weight

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Old 12-30-2011, 08:16 AM
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Default HD Fork oil Weight

Hi I need to purchase a 10W50 oil from HD..
My local dealer carries only Type B,Type E & SE fork oil...

Would like to know from someone here what's the weight of the different fork oil from HD?
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Old 12-30-2011, 09:54 AM
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Default fork oil dynamics, help needed

Quote:
Originally Posted by shrini23 View Post
Hi I need to purchase a 10W50 oil from HD..
My local dealer carries only Type B,Type E & SE fork oil...
Would like to know from someone here what's the weight of the different fork oil from HD?
shrini, please forgive me intruding on your thread but I too, would like info on this. I have same question but for different reasons and would like some education on oil weights and what the different ones accomplish.

When I changed out my sliders (had an indy shop do it actually) noticed my front end started hitting metal on metal on medium holes and bumps. I did not do a change out of the sliders, I had them chrome my original ones and re-install. Now, when I changed them out I only had like 300 miles on the bike and was taking it real easy so not sure if it would have done this anyway. When I told the shop of the problem, they said bring it back and they will put a heavier oil in it. I haven't done that yet. That begs the obvious question though...why wasn't the oil they put in, the same oil or maybe it was?... I don't know.

Does this sound logical to those who know? This is a very reputable shop, I can't see them putting the wrong oil in. Anyone?
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Old 12-30-2011, 11:23 AM
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Type B/E is 5wt.

SE is either 10w or 15w.

10w50...isn't that motor oil? I don't think that's a good substitute for fork oil (which I think leans more towards a lightweight hydraulic fluid)
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Old 12-30-2011, 12:01 PM
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According to forum member Skratch

type e - 5 wt (standard for showa forks)
type b - 10 wt
se heavy - 15 wt
se race - 20 wt

I use SE heavy in my forks

10w-50 is a multi-viscosity motor oil.
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Old 12-30-2011, 03:27 PM
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I've switched to SE heavy on most of my bikes, better ride and no bottoming, haven't done it on this bike yet, mainly because of the PIA in changing oil in these forks.
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Old 12-30-2011, 04:04 PM
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I've switched to SE heavy on most of my bikes, better ride and no bottoming, haven't done it on this bike yet, mainly because of the PIA in changing oil in these forks.
Were you getting bottoming out with the standard fork oil then? Looks like four different grades...interesting there is that much to choose from. How touchy was it before changing out to the heavy? It seems my metal on metal occurs when the forks recover back UP not when it compresses down. Is that typical?
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Old 12-30-2011, 05:09 PM
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My forks would bottom on compression and rebound quite often with the stock fork oil in them, I switched to the SE heavy stuff and no bottoming anymore.
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Old 12-30-2011, 06:03 PM
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I went the route of heavier springs with lighter oil. (amsoil, shock theraphy 10wt)
Bottoming out is a thing of the past.
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Old 12-30-2011, 06:14 PM
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Quote:
Originally Posted by FBinSoCal View Post
Were you getting bottoming out with the standard fork oil then? Looks like four different grades...interesting there is that much to choose from. How touchy was it before changing out to the heavy? It seems my metal on metal occurs when the forks recover back UP not when it compresses down. Is that typical?
On both the sportsters and the fxr and 91 dyna, I had a problem with them bottoming on some bumps and not all that steady in corners. Switched to the SE heavy and was very happy.
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Old 12-30-2011, 06:23 PM
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Quote:
Originally Posted by MXerwithaBob View Post
My forks would bottom on compression and rebound quite often with the stock fork oil in them, I switched to the SE heavy stuff and no bottoming anymore.
Same here. Replacing the oil with the SE heavy was suggested here when I was thinking of buying a fork upgrade kit. The suggestion was to try the least expensive thing first. Worked well for me!
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