Front forks - SV1000 Portal
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post #1 of 3 (permalink) Old 11th May 2020, 08:38 AM Thread Starter
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Front forks

Hi All.I recently did a fork oil change on my 2007 Sv1000s.The forks were stripped and cleaned.I used Motoul 10weight fork oil.Max fork fravel is as close to 10 cm.I reset to factory settings and now i can get a max of 7cm travel.Is this correct or have i missed out on something on the reassembly of the forks?Any advice will be appreciated.
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post #2 of 3 (permalink) Old 11th May 2020, 11:06 PM
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10 weight ? The thing is gonna ride like a jackhammer

Why? 2.5w is standard..... i went to 5w with the standard springs, and stayed with that even when i put RaceTech springs in....

The air gap needs to be aet first, then you look at what "sag" you get get form your spring rate/tension.
The fork needs to be collapsed, spring and rebound rod out. and then you fill the fork until the air gap is what the
manual says... cant remmeber what the 05 up bikes were, but my 03 was 162mm.
The fork leg and the damper rod need to be pumped to get any air bubbles out as well, then re-check the oil height.

If you decrease the air gap, (make it smaller), you are effectively increasing the spring tension hydraulically....
In the same way, the heavier fluid will increase the spring rate, sort of....making the forks move more slowly, and the forks can become vague, as they aren't as compliant over bumps.....

Someone will come along and tell you what the air gap should be for your year bike.....

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post #3 of 3 (permalink) Old 12th May 2020, 03:49 PM
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Originally Posted by Missing Link View Post
In the same way, the heavier fluid will increase the spring rate, sort of....
Stiffer oil doesn't alter spring rate in any fashion. It only affects damping, and will not meter through stock valving properly at all. With oil that heavy you can kiss damping adjustment goodbye, and the suspension will never be acceptably ride-able.
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