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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive through July 13, 2010 » How much fork oil for a 06 XB-X « Previous Next »

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Bluzm2
Posted on Monday, July 12, 2010 - 12:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Will a quart be enough for a rebuild for both legs of an 06 Uly?

Thanks.
Brad
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Dr_greg
Posted on Monday, July 12, 2010 - 02:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

From my memory...not quite. You put around 18 oz of fork oil in each fork (actually you set it by height, but that's close).

And a quart is 32 oz, right? So you need a little more.

--Doc
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Froggy
Posted on Monday, July 12, 2010 - 02:24 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Change the fork springs to the 07 springs while you are in there.
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Bluzm2
Posted on Monday, July 12, 2010 - 02:57 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Frog,
What's the difference? anyone got a part # for them? I only have the 06 parts book.

Brad
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Goldtooth
Posted on Monday, July 12, 2010 - 03:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

J0113.2AK
qty - 2

just ordered mine.
nate
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Ratbuell
Posted on Monday, July 12, 2010 - 08:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Difference is night and day. I never had a "problem" with the handling on my 06 but I ran preload one weight range heavy to combat brake dive. 07 springs are progressive, and WOW. No dive, great handling, the *right* preload seting...a very nice upgrade. Be sure to use 07 settings for weight, and the 07 fluid settings.
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Bluzm2
Posted on Monday, July 12, 2010 - 11:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Done deal Rat, that's all I needed to know.
So, what's the settings and such for a 07? I've only got the 06 manual.
What's the level for the 07 vs 06? The 06 says to start with 18oz and then adjust to 113mm from the top.
What's the 07 say?
Regardless, looks like I'll need another quart of the Race Tech from Al, I've only got one quart..

Thanks much for all the info guys, I need to get those springs ordered..

Brad
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Froggy
Posted on Tuesday, July 13, 2010 - 02:09 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Brad, this is from an annony post a few years back


quote:

Anonymous Posted on Friday, September 15, 2006 - 12:31 pm:

It's interesting to see the various theories, it reinforces that fact that suspension set-up is a very personal thing. Every rider wants different things because they have different wants & needs. That is why there is adjustment. One setting won't work for everyone in every riding situation. The setting charts in the manuals are just a good starting point or "baseline". I encourage you to experiment with adjustments to find out what you like best, don't worry, you can always go back to the "baseline" if you get lost.

The one major thing that I missing from this discussion is that on any fork type suspension there are really two springs, the coil spring and the "air" spring. As the fork travels into the stroke, the volume inside the leg gets smaller. The oil and metal parts can't compress, but the air does. So, as the fork gets shorter the air pressure gets higher and pushes back (remember the ideal gas laws from physics P*V=MR*T). This air spring effect can be a very large force, or a very small force depending on the ratio of compressible stuff and uncompressible stuff inside the fork. To demonstrate this affect, think about what would happen if you filled the fork 100% with oil, would it compress at all?

Because of the air spring is always a progressive rate (for the fork type of suspension anyway) even if you have a straight rate mechanical spring you end up with a progressive overall rate! How progressive this overall rate is very dependant on oil level and becomes more and more sensitive to oil level tolerance as you adjust the oil level (replace the compressible air with incompressible oil). Remember the ratio is what's important here.

Ok, thought I'd set the record straight with some facts now.

2006 Ulysses:
Single Rate fork spring 39 lbs / in
Oil level 113 mm from top with fork fully compressed (+ or - a few mm ideally)

2007 Ulysses:
Triple Rate fork spring 39 lbs / inch up to 3 inches of travel
59 lbs / inch from 3 inches to 5.4 inches of travel
84 lbs / inch from 5.4 inches to 6.5 (bottomed)
Oil Level 172 mm from top with fork fully compressed (+ or - about 8 mm no problem)




Here is an old post by Tootal of him doing the spring swap:
http://www.badweatherbikers.com/cgibin/discus/show .cgi?tpc=142838&post=1390178#POST1390178

(Message edited by froggy on July 13, 2010)
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Ratbuell
Posted on Tuesday, July 13, 2010 - 07:47 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

...and the 07 manual is posted at the top of the BBD section here on badweb : )
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