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Whodom
Posted on Monday, December 12, 2005 - 02:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I finally got to test-ride an XB12X Saturday (see thread in the "Big, Bad, & Dirty" forum) and I was really impressed that it seemed to transmit a lot less engine vibration to the handlebars than my 2000 S3. To those of you that have ridden or own both XB's and tubers, is this normal? I wouldn't say the bars on my S3 vibrate a lot, but there is a small amount of "buzz", even at 3,000 RPM and up. It's just that the bars on the XB12X were completely vibration-free at these speeds.

I've read the threads about a bad front isolator causing increased vibration in the handlebars on tubers. I inspected my front isolator and can't see any signs of damage. Is it possible the damage is hidden? Is it worth replacing the front isolator anyway on a bike with ~12,000 miles on it? I replaced the rear isolators this summer.

Thanks in advance for any opinions or tips.
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Bomber
Posted on Monday, December 12, 2005 - 02:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

who -- the damage on a front ISO CAN be tought to see0feel -- given the age of the rubber, and the ease of the job (hour end to end), I'd go ahead on and replace the front one -- get the properly size crowfoot socket to torque the fasterners (coupla bux at sears), and have at it --
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Whodom
Posted on Monday, December 12, 2005 - 06:39 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Bomber,

Thanks for the advice. I went out again tonight and checked it really thoroughly- no signs of tears, but it does seem to be "sagging" toward the front a little, and there is some surface cracking which would seem to indicate the rubber is starting to deteriorate.

I just sent DaveS a PM to see about getting a replacement.
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Jlnance
Posted on Monday, December 12, 2005 - 06:56 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The XB12X vibrates a lot less than my M2 did. I testrode an XB12S about 6 months ago, and it vibrated a lot less as well. I've always assumed thats just the way things are, and nothing was wrong with the M2.
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Whodom
Posted on Monday, December 12, 2005 - 07:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

This may turn out to be my last ditch effort to stave off selling off my first-born so I can buy a Uly....
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Dragon_slayer
Posted on Monday, December 12, 2005 - 08:10 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Go for it Whodom! You can always keep the second-born.
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Spiderman
Posted on Monday, December 12, 2005 - 08:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Whodom.
My front iso didn't look damaged, But when I removed it there was a small tear that was hiddin under the D washer.

If you got more than 50k on the Odo I would recomend replacin it, specially if she is vibin a little too much...
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Bomber
Posted on Tuesday, December 13, 2005 - 09:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

the problem is that the vibes increase slowly over time, so it's tough to know if you're getting to be a wuss in your old age or not ;-}

I'd suggest that surface cracks are a sign that it's time to R&R the lil rubber bisquit, er, doughnut -- miles or exposure to the cruddy atmosphere, either one will toaast the rubber, I'm thinkin

the great news is that it's a standard HD part, so it's easily available (PS, the parts guy will think it's a dyna part -- you and I know it's a Buell part used on the dyan line [grin])
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Bob_thompson
Posted on Tuesday, December 13, 2005 - 12:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I know this isn't the case here, but a while back I fabricated an upper front tie bar, for my M2, adjustable, to augment the lower as some of the older Buell's had as I understand it from the KV. I thought a little additional strengthening couldn't hurt. Well, after riding a short while I noticed quite a bit more vibration in the bars so I removed it figuring Buell really knows something I don't with their upgrading of tubers over the years. I think these engines have to move a small amount for the bike to live happily. Thus, the rubber isolaters. Way smoother though than the old solid mounted engine bikes. Bob
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Smadd
Posted on Tuesday, December 13, 2005 - 01:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

"the problem is that the vibes increase slowly over time, so it's tough to know if you're getting to be a wuss in your old age or not"

Exactly. I remember test riding the 1998 S3 when new and distinctly remember that I could detect *no* vibration! I was amazed at the time. With time and mileage (now over 53,000), I suppose the manufactured tolerances changed, along with things I played with, and now the vibration is there, but hardly noticeable. It's definitely not a bother. Not saying the new bikes aren't smoother. Maybe they are... I haven't ridden any. Although I doubt the feeling of "no vibration" on my then new '98 could be improved on much.

Steve
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