Author Topic: 91 C 10 fork cap hex is rounded off, advice needed  (Read 8165 times)

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Offline JimBob

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Re: 91 C 10 fork cap hex is rounded off, advice needed
« Reply #50 on: November 22, 2016, 12:33:58 am »
You're overthinkin' the emoticons - just click on the one you want to use, it will insert at the current cursor position!

Initially you may just see the BBCode for it - like I think the big tooth smiley ( :) ) is a colon and close paren: : )


Offline connie_rider

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Re: 91 C 10 fork cap hex is rounded off, advice needed
« Reply #51 on: November 22, 2016, 12:53:16 pm »
roadisattva, if you want, ship me the original fork leg and I think I can open it up.
It's become a challenge now.  Would love to try.. >:D

Couple of thoughts;
Did you install both of the donor forks?
When we started using ATF, I knew the approx. viscosity.
Knew each brand was different.
So, being a tinkerer, I built a simple tester to check the viscosity.

 NOTE: I worked for Shell Oil in the Fuels Engineering group.
            Went and talked to the Lubrication Engineers.

Also, you didn't say how the forks felt with the new springs??

Ride safe, Ted
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Offline roadisattva

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Re: 91 C 10 fork cap hex is rounded off, advice needed
« Reply #52 on: November 22, 2016, 03:01:07 pm »
Ted,
I changed both forks because the set from the 86 had the air system work a round.  So now I have what looks like progressive springs or at least post 93 springs and they seem to ride nice and firm with the atf and no air system.  So which atf's in your searching have the heavier viscosity? Did you look at the top spring in my pic. It matches the progressive spring pic on Murphs site down to coil count. I feel like I have made a real upgrade that will be on the bike for a long time instead of just a short term fix.  For a while the old forks are making the parts bike a roller. I guess I would only use them to get an air system early bike going.  I rode 80 miles so far and all seem well. I was looking for RR tracks and manholes to go over.   Little to no dive in the front and no leaks so far. Trying 36 psi in the tires for now.  Next is to service the rear shock and suspension and swap the rear wheel/tire to the 91 from the parts bike.
Another Steve

Offline connie_rider

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Re: 91 C 10 fork cap hex is rounded off, advice needed
« Reply #53 on: November 22, 2016, 03:28:32 pm »
Sounds like your getting there.
I did the viscosity tests somewhere between 1985 and 1990.
So, the info wouldn't be any good now.
I (and I think most) use 40 psi in the tires.

The springs in your photo look just like the springs I took out of my 2003.
Been some time since I installed the Progressives, so I don't recall details; but I think they were a constant wind, not the varied grind that you have.

Need someone to clarify that?

Ride safe, Ted
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Offline roadisattva

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Re: 91 C 10 fork cap hex is rounded off, advice needed
« Reply #54 on: November 22, 2016, 06:26:00 pm »
If you look at the progressive springs pic and click on it on Murphs site you can clearly see the two different windings and the count of each is the same as my parts bike springs.  I would like to see a pic of post 94 springs that I could count the coils on as well. Either way I am fine with the way it rides and consider the ones I have an upgrade.
Another Steve

Offline MAN OF BLUES

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Re: 91 C 10 fork cap hex is rounded off, advice needed
« Reply #55 on: November 22, 2016, 08:33:03 pm »
Sounds like your getting there.
I did the viscosity tests somewhere between 1985 and 1990.
So, the info wouldn't be any good now.
I (and I think most) use 40 psi in the tires.

The springs in your photo look just like the springs I took out of my 2003.
Been some time since I installed the Progressives, so I don't recall details; but I think they were a constant wind, not the varied grind that you have.

Need someone to clarify that?

Ride safe, Ted
t
The springs he installed, the one on top in his piscture, are truley the Progressive product from Murph, so that is a good swap for sure... the bottom one is a stock pre '94 spring.... I have 3 sets of them, as I replaced a lot of them with Progressive...

In reality both springs are a "progressively wound spring", meaning different areas of the spring react to compression differently....  the bottom spring clearly shows larger coil spacing, and its overall length is shorter...   in spring function, this is a ""mushier"" spring... also, the Progressive products coil spacing, wire diameter, and overall inside/outside diameters vary from the OEM ones, and they ware about 20-25% stiffer...less sag, and better reactivity to stutter bumps and compression...

Also note, boths forks are pre 94, so both get fluid levels checked with springs out, and fully extended.... not compressed... :-X

Good job Rodie, you did good. :great: and lucked out on those springs... :great: :beerchug:

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