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Old 11-25-2013, 01:09 AM   #1
aurel OP
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Question Should I change my fork springs?

Hi everybody,

I'm servicing my fork ('08 990 S - 180.000kms mostly two up with luggage) and I took a look at the length of my springs.

When brand new they are 488mm long.
Mine are now 483mm long.

Should I change them or just add some spacers and keep going?
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Old 11-25-2013, 01:47 AM   #2
bikyto
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Hi Aurel,
Consider the spring fatigue in correlation to the static length. How much more do they collapse under load as opposed to how much new springs would compress?

To me, your front end felt soft while we met in California. What spring rate do you currently have? It may be a good opportunity to make an adjustment now.

A bientot.
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Old 11-25-2013, 02:14 AM   #3
aurel OP
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I got told by a KTM that only the length would change, not the strenght. Was he wrong?

I confess I know nothing about springs!
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Old 11-25-2013, 03:38 AM   #4
Rodknee
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All springs sag eventually. Personally, the fork springs on the 950/990 are to weak for anybody over 100lbs. Now is the time to upgrade them for something in the .5x range or higher.
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Old 11-25-2013, 03:46 AM   #5
bikyto
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They sag and you can add spacers to compensate the geometry. But their performance will degrade overtime.

I had 0.54 before from the 0.48 stocks. I still didn't like it. I'm happy with the 0.70. With the proper valving, the bike handles the safari tanks/fuel load great as well.

Going above 0.56 without doing any valve work isn't recommended.
My 2 cents
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bikyto screwed with this post 11-26-2013 at 10:52 AM Reason: Typo
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Old 11-25-2013, 08:18 PM   #6
Marko888
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For sure Replace the stock springs with something firmer.

I have 0.64 in mine...but the forks have also been revalved. If not revalving, I would caution on the 0.70, as those may overwhelm the standard rebound valving.
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Old 11-25-2013, 08:58 PM   #7
David37
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I would install stiffer fork springs and change your fork oil. If you have the $$, IMO I would still replace your fork springs and get your forks revalved for your weight and two up riding style.
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Old 11-26-2013, 10:10 AM   #8
James Siddall
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Quote:
Originally Posted by aurel View Post
Hi everybody,

I'm servicing my fork ('08 990 S - 180.000kms mostly two up with luggage) and I took a look at the length of my springs.

When brand new they are 488mm long.
Mine are now 483mm long.

Should I change them or just add some spacers and keep going?

I would agree with everyone here, but you all seem to have it handled.
Increase in spring rate = amazing new motorcycle

Cheers

James
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Old 11-26-2013, 08:23 PM   #9
Oilburner375
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"I would agree with everyone here, but you all seem to have it handled.
Increase in spring rate = amazing new motorcycle"

+100
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