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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through June 12, 2008 » Suspension / stiction « Previous Next »

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Josh_
Posted on Wednesday, May 21, 2008 - 06:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

While at Lee Parks Advanced Rider Clinic over the weekend, my bike was picked for the suspension demonstration. This ARC was put on by PTT who also did Inside Pass the last few years and the instructors are all Buell fans.

The one thing they remarked on was how much stiction my front forks had. When trying to measure sag, the front forks simply would not move smoothly from extention to rest or compression to rest, and the number was several mm apart (I was on the bike not writing down the #s so I don't remember the exact #).

They tried several times each way and the forks kept stopping during the travel.

Anyone else have this issue on their bike? I'd hate to have to pay to rebuild the suspension on a new bike, but anyone know if Buell will warranty "excessive stiction" ?

I thought the larger forks were supposed to help minimize that anyway?

Josh
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Old_man
Posted on Wednesday, May 21, 2008 - 06:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Maybe some miles will improve the action.
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Josh_
Posted on Wednesday, May 21, 2008 - 06:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

1100 on it now...
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Jcbikes
Posted on Wednesday, May 21, 2008 - 07:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I would try loosing the front axle pinch bolts then move the front forks up and down a few times using the front brake so that they settle in. Then tighten the two bolts back up. Do not loosen the axle when doing this just the two pinch bolts. The forks could be binding if they are not settled equally. I always do this when putting the wheel on. Just a thought on this to try out.
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Chevycummins
Posted on Wednesday, May 21, 2008 - 07:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I noticed this a little on my bike also. I'm sure my dealer would laugh at me if I asked them to look at it. I'm just too hard to please!
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Josh_
Posted on Wednesday, May 21, 2008 - 08:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

JC, know the torque settings for the pinch bolts?

I will bring it up at my dealer next time I go, several in the tech and sales dept attend track days so its not your typical dealer.
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Chevycummins
Posted on Wednesday, May 21, 2008 - 08:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Just a thought, if the front forks don't have synthetic lube in them changing over might help.
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Xb9
Posted on Wednesday, May 21, 2008 - 09:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Josh-, do what JcBikes said, but pull the axle first and make sure there's some lube or anti- seize where the left leg is pinched to the axle. The axle has to be able to slide and center itself there.
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Josh_
Posted on Wednesday, May 21, 2008 - 10:19 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

anyone got torque specs?
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Blake
Posted on Thursday, May 22, 2008 - 12:48 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Around 20 FT-LBs should be about right. Same as for the rest of the Buells with ZTL.

What Jcbikes said, except dont' use the front brake for the last few cycles, for those push straight down on the handlebars and try to get the suspension working up and down good. Then let it settle and torque the pinch bolts. Good'n tight.
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Blake
Posted on Thursday, May 22, 2008 - 12:50 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If stiction remains excessive then possible cause may be misaligned triple clamps, bent cartridge/damper rod, or debris or damaged bushings.
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Krassh
Posted on Thursday, May 22, 2008 - 01:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Front axle pinch bolts 27-30 Nm 20-22 ft-lbs
(tighten twice alternating bolts)
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Krassh
Posted on Thursday, May 22, 2008 - 01:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Front axle 52.9-55.6 Nm 39-41 ft-lbs
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Josh_
Posted on Thursday, May 22, 2008 - 02:01 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks guys, I'll try it tomorrow.
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Josh_
Posted on Monday, June 02, 2008 - 12:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

No effect. Had some suspension guys look at it, comments ranged from "bent is bent" to maybe a rebuild could fix it.

Off to the dealer...
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