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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive through June 22, 2010 » 06 to 07 fork spring upgrade « Previous Next »

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Whitj
Posted on Friday, June 11, 2010 - 02:06 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Anyone know the proper position that the 07 spring should be installed?
The picture below looks like the tightly wound portion of the spring coils goes in first or to the bottom of the the tubes closest to the ground. Feedback anyone? I what to do the upgrade this weekend.
Thanks for the input.


http://www.badweatherbikers.com/buell/messages/142 838/442538.html?1236474150

Look at:
"Now you can insert the springs:"
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Glenn
Posted on Friday, June 11, 2010 - 02:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The spring will work the same whether the tighter would part is on the bottom or top. The tighter would part is heavier and commonly put in first so the heavier part is closer to the wheel axle/ground..
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Glenn
Posted on Friday, June 11, 2010 - 02:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Also look at this post for the correct fluid level to use with the 2007 springs.

http://www.badweatherbikers.com/cgibin/discus/show .cgi?tpc=142838&post=741654#POST741654
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Whitj
Posted on Saturday, June 12, 2010 - 04:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Glenn
Thanks for the insight. That is what makes this page such a pleasure to be part of. All the helpful people. Thanks again
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Glenn
Posted on Saturday, June 12, 2010 - 06:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

You're very welcome!
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Ratbuell
Posted on Sunday, June 13, 2010 - 11:04 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I think there *is* a right and wrong way to put them in...I had mine done at my 10k service (they were in the forks anyway) so not sure if they go loose-coils up or down...but I'm pretty sure it does matter. It's all part of the "progressive" aspect - one part of the spring has to compress first, then *progress* to the other section/other spring rate, in order to get the progressive damping feel.

And yes, make sure to use the '07 fluid levels.
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Tootal
Posted on Sunday, June 13, 2010 - 12:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I put them in tight coils first because in my sick twisted head, the wheel is moving toward the spring so if you have the forks using the lighter, tighter coiled, springs first as the harder end just sits there and waits for a heavier hit in order to go to work. In other words the busier end should be closer to the input.
Now having said that, since the spring is under pressure at all times it doesn't know where the input is coming from it just squeezes together with it's weakest coils going first so it doesn't matter which way it goes.
I think the center of gravity argument might be the better answer although you would need a machine to tell the difference.
A good question more likely suited to someone engineering at Progressive Suspension.
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Garrcano
Posted on Sunday, June 13, 2010 - 02:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

OK, and what does the 2007 Service Handbook say?

P.D. I only have a 2006 SHB. So maybe it's interesting someone with a 2007 book can put some light in.
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Tootal
Posted on Sunday, June 13, 2010 - 03:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I tried to go to Progressive Suspensions website but they must be having problems as it would not come up. I researched some other bike forums and found one company that says to put their springs in with the tight coils up. I then found a guy putting progressives in his KLR. They were Progressive's springs and he said the instructions say it doesn't matter which way as long as they are the same on both sides. I would say that makes the most sense.
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Husky
Posted on Sunday, June 13, 2010 - 06:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Actually, you want to maintain the minimum of un sprung weight so the loose coils should in first (closest to the front axle).

But I doubt we would be able to sense the difference........

husky
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