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Buell Forum » Old School Buell » Archive through July 25, 2008 » Wheel alignment and front brake switch 00X1 « Previous Next »

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Drfoster
Posted on Monday, July 07, 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)

Hi guys,

I did a search on this but only got hits from somebody's vacation thread... nice pics though!

I'm looking on information on what the non-buell part is for the front brake switch (the car part # ??) and how to check my front to rear wheel alignment.

What I've recently ran into with the question about the alignment is a high speed wobble that is VERY light at a sustained 130-140 MPH but has the fixings of turning into something really painful as it does get worse if I continue to leave the speed on or increase it. I can almost get the bike to begin a wobble even as low as 75 mph, as though it has that "feel" like the front end is ready at any moment to start going.

I've checked tires, pressures, steering head bearings and tightness of said bearings, but am left with the wobble of death.

That is why I was thinking that the rear/front wheel alignment may be a bit askew, or something I have overlooked.

Oh - in case you're going to flame me for the speeds I was sustaining, it was, and always is, on a closed course. :o)

Any help is appreciated!

R
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Jos51700
Posted on Monday, July 07, 2008 - 10:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I've never had wheel alignment cause a wobble. In fact, HD's run offset by a significant amount On the touring models and they never wobble (I've had them to 140 plus with motor work), and I've ridden bikes with up to 10 degrees of out-of-line front to rear. They corner weird, and track funny, but no wobbles. Even twisted forks have never a wobble made, with me on board.

The ONLY thing I've ever experienced that consistantly had a wobble, was loose steering head bearings.

Of course, I never seem to get wobbles when others here swear they always happen.

Aerodynamics may be a factor, too.

I'm betting that you have discovered why certain sanctioning bodies require steering dampers. Of course, since this ONLY occurs on closed course, with a professional aboard, you prolly already knew that...: )
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Jos51700
Posted on Monday, July 07, 2008 - 10:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I've seen the Buell brake light switch on Jap bikes, but never in Car World.

And, an edit: An out-of-balance front wheel can cause a high speed wobble.

Edit 2: Have you tried overtightening the steering head bearings a bit?

(Message edited by jos51700 on July 09, 2008)
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Natexlh1000
Posted on Wednesday, July 09, 2008 - 05:30 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Buell brakes are nissin.
I would yank the switch out and take it into a jap dealer.
Actually, I would go to a H-D deler first since the prices are usually lower.
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Mbsween
Posted on Wednesday, July 09, 2008 - 01:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

IIRC the switchgear is the same as the Ducati Monster fro that time period

There are a variety of ways to check front to rear wheel alignment, usually involving two long two by fours (or similar) or string. The basic idea is to get a reference point from the front wheel to the rear and take measurements.

There is an example here
or here
or here

My X1 won't touch anything over high 120s, but its rock solid there. Is the track surface you're riding on choppy? Could this be a suspension issue?

Given the speeds you're pushing I'd want to use something more exacting like Computrack
http://www.gmd-computrack.com/.
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