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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » BB&D Archives » Archive through August 10, 2008 » Heavier flywheel? « Previous Next »

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Growl
Posted on Thursday, August 07, 2008 - 11:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

It's sort of a Buell signature that the Buell engines based on Sportsters have lightened flywheels - which is good for that rush of acceleration...
Yet the ULY runs a bit erratic at low RPMs, even though it actually is quite torquey.
Us dirt riders could dig a solution to this, some lower their primary gearing, but myself would prefer not to give up the overdrive like fifth gear.
Adding weight to the flywheel is a classic approach to making dirt bikes more tractable at low RPMs... Would a stock Sportster flywheel work?

(Message edited by growl on August 08, 2008)
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Buelldualsport
Posted on Friday, August 08, 2008 - 10:13 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Interesting concept


YRMV

Buells to Alaska ALCAN 5000 2010

(Message edited by buelldualsport on August 08, 2008)
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Natexlh1000
Posted on Friday, August 08, 2008 - 11:20 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I think the cases have evolved away from the original XL1200 since 1999.
With narrower flywheels, I think the oil scrapers and whatever baffling has been altered to match.
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Barker
Posted on Friday, August 08, 2008 - 11:54 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

IIRC the 06 uly was given a heavier flywheel than any other XB and an alter fuell map to aid in low speed riding.
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Barker
Posted on Friday, August 08, 2008 - 12:01 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

"A heavy flywheel means it doesn't rev up super-quick, but that extra mass pays off when applying throttle in low-traction situations."
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Strokizator
Posted on Friday, August 08, 2008 - 12:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I've always been under the impression that the flywheels were heavy as an explanation as to why engine braking is not as good as I'd like.
I guess it's all a matter of perspective.
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Froggy
Posted on Friday, August 08, 2008 - 12:12 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

First time ive heard that the Uly has a different flywheel. It didn't feel any different than my SS or any other XB i have ridden.
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