Gen 1: 2004-2005 Preload adjustment having no effect on sag? - Kawasaki ZX-10R.net
 
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post #1 of 10 Old 04-20-2012, 03:41 PM Thread Starter
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Preload adjustment having no effect on sag?

I have been using the race tech method to measure my front fork sag, and no amount of preload can get my static sag less than 33 mm. Whether I have 1 line showing or 5, it seems to have no effect on sag numbers. It seems stuck between 33-35 mm. Any ideas? I'm 200 lbs without gear, and from what I have read the stock spring rates on a gen 1 are more than suitable for my weight.
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post #2 of 10 Old 04-20-2012, 04:11 PM
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Originally Posted by Eric_The_Jew View Post
I have been using the race tech method to measure my front fork sag, and no amount of preload can get my static sag less than 33 mm. Whether I have 1 line showing or 5, it seems to have no effect on sag numbers. It seems stuck between 33-35 mm. Any ideas? I'm 200 lbs without gear, and from what I have read the stock spring rates on a gen 1 are more than suitable for my weight.
33 -35 is an ideal number for sag... Why do you want less sag...

Sorry I can't answer your original question.

And I think the front fork/shocks are designed for 180 - 220 lbs rider... rear spring for 150lbs rider
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post #3 of 10 Old 04-21-2012, 10:18 AM Thread Starter
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I have always aimed for a more track oriented sag number on most of the bikes I have owned because I ride pretty hard on the street with a few track days sprinkled in here and there. My concern is why the sag number is not changing with even max preload dialed in? I want to try 30/28 sag settings front/rear.
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post #4 of 10 Old 04-21-2012, 11:20 AM
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That is weird...
When is the last time you got your forks rebuilt?
Maybe sticktion is not letting them sag properly.
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post #5 of 10 Old 04-21-2012, 11:24 AM
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That is weird...
When is the last time you got your forks rebuilt?
Maybe sticktion is not letting them sag properly.
my guess as well...were the forks ever bent? Were the adjusters ever forced passed their range of movement?
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post #6 of 10 Old 04-21-2012, 11:25 AM
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or is your compression set on the hard side...
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post #7 of 10 Old 04-21-2012, 03:19 PM
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Running into the top out springs? By static sag do you mean you not on the bike? Static is unweighted, rider sag is with you on it.
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post #8 of 10 Old 04-21-2012, 04:44 PM Thread Starter
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Running into the top out springs? By static sag do you mean you not on the bike? Static is unweighted, rider sag is with you on it.
I was referring to static sag with me on the bike. I refer to the unweighted sag as "free sag", as does Race Tech:

(#3).
http://racetech.com/page/id/30
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post #9 of 10 Old 04-21-2012, 11:43 PM
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Quote:
Originally Posted by Eric_The_Jew View Post
I was referring to static sag with me on the bike. I refer to the unweighted sag as "free sag", as does Race Tech:

(#3).
http://racetech.com/page/id/30
OK. Now are you getting any preload changes with the adjusters? Have you had any work done on the forks, rebuild, oil change, seals?

Due to the top out springs, unless your very heavy you can get funny sag readings with the adjuster cranked all the way in.http://www.racetech.com/html_files/preload.htm

Last edited by RPG76; 04-21-2012 at 11:53 PM.
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post #10 of 10 Old 04-22-2012, 10:10 AM Thread Starter
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Maybe you're on to something RPG. The bike only has 2k miles, and has never been wrecked. I have even loosened the fork pinch bolts to make sure the forks were in alignment and not binding. Sport Riders setting on the fork was with only 2 lines showing, which is almost cranked all the way in. I went all the way up to that setting and the sag numbers are roughly the same. I can tell the preload is changing though because the ride height seems greater in the front now.
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