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Buell Motorcycle Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive through April 18, 2008 » Fuell Article: Drive belt development « Previous Next »

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Mark_weiss
Posted on Friday, April 11, 2008 - 02:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

The article notes that the Ulysses was observed to exert notably higher (+25%?) drive belt loading than other models.

Mark
in Arizona
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Miamiuly
Posted on Friday, April 11, 2008 - 02:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Due to more travel in the swing arm I guess?
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Johnboy777
Posted on Friday, April 11, 2008 - 02:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I noticed that, Mark, as well. I wonder if this might have a bearing on, a bearing on ... damn, just lost my train of thought. Oh well!
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Treadmarks
Posted on Friday, April 11, 2008 - 02:44 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Ya think???
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Prowler
Posted on Friday, April 11, 2008 - 03:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

My son just purchased an '07 STT and the same thing applies. The belt is tight as a drum (couldn't deflect it more than an 1/8" if my life depended on it). I've had him order another spring loaded tensioner $$$ for his bike. Expensive, but worth it in the long run, in my opinion. I don't ever remember my Sportster's belt being that tight and using the "H-D" gauge to set the Sporty's belt tension resulted in noticeable deflection on the belt when I pushed on it. Of course the swingarm geometry is different on Buell's, but even at max tension, my Sportster belt wasn't anywhere near this tight. Although I'm sure the Buell's belt tension falls within all the engineering parameters, I've always adjusted my Harley's belt a little on the loose side figuring less load on the whole secondary drivetrain. Think I'm going to stick with that concept as I have yet to break a belt.



(Message edited by prowler on April 11, 2008)
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Jlnance
Posted on Friday, April 11, 2008 - 09:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

I don't ever remember my Sportster's belt being that tight and using the "H-D" gauge to set the Sporty's belt tension resulted in noticeable deflection on the belt when I pushed on it.

For every bike other than a Buell, the belt tension changes as your suspension moves. It has to be loose to allow suspension travel.
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Buellgrrrl
Posted on Friday, April 11, 2008 - 10:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Kudos to Buell for being so frank in discussing the belt's evolution and the problems they solved. We've never seen that kind of honesty and transperency from BMW (remember the paralever, early K driveshaft, and now differential failures?).
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Prowler
Posted on Friday, April 11, 2008 - 11:32 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Ever since the cogged belt reduction drive unit on my homebuilt airplane, I've been a little paranoid about belt tension vs. belt life. I guess that's why I prefer them a little loose. I think the Buell final drive belts are a wonder of modern science. To drive 90 HP thru that little belt (lots more on 1125R) is amazing, I think. It's a wonnerful thing when compared to chain final drive.
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Cityxslicker
Posted on Saturday, April 12, 2008 - 01:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

didnt see them list a marked decrease in belt life for riding it off road... I know I am going through belts faster than my pavement hugger City-X cohorts
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Tiberius
Posted on Saturday, April 12, 2008 - 10:12 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

What issues was this in?
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Froggy
Posted on Saturday, April 12, 2008 - 07:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only)

Tiberius, the current one, my guess is that yours didn't come yet either : )
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