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Buell Forum » Old School Buell » Archives OSB 001 » Archive through September 06, 2006 » Bike getting loose in turns. « Previous Next »

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Impulse_101
Posted on Monday, August 21, 2006 - 10:22 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My 97 S3T is starting to wobble when I have it leaned over in even moderate turns. I've had the neck bearings repacked yearly and this doesn't seem to be coming from the front of the bike, instead the back tire feels like it's unstable.

The tires are fairly new Pirelli Scorpion Sync they were mounted at the end of last year they've been fine all season and the problem just started. My back break pads are presently worn out and have to be replace but I don't think that has anything to do with it either.

The rear isolators were replaced two seasons ago and look fine. The swingarm bolts don't seem loose or worn either, based on a visual inspection from outside.

The bike seems fine when upright and straight, even at high speeds but as soon as I lean over the back end starts to feel unstable.

Any ideas?


Thanks,
JT
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Bomber
Posted on Monday, August 21, 2006 - 10:27 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Imp -- with two wheelers AND four, what can feel like a problem at one end of the beast is often caused by the other end --

I assume you've checked tire pressures, fore and aft, and that the wear on your tires isn't an issue (I've not used your brand, but I know that Dunlops that came as OEM with my M2 would be well and truely shot, causing many handling evils, when they still appreaed to have much life left in them)

wheel bearsing? can use raise each end of hte scoot and try to wiggle the wheels in directions they should not wiggle in?
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Blake
Posted on Monday, August 21, 2006 - 01:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My first thought was rear isolators, but you say they look okay. Maybe give them some extra scrutiny with a bright light up close.

Second thought would be to carefully inspect for signs of lubricant leakage. In this hot weather, a little water/moisture in the transmission/primary reservoir could lead to some oil being blown out of the breather line.
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Blake
Posted on Monday, August 21, 2006 - 01:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Also, check rear shock settings/integrity?
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Johnnylunchbox
Posted on Monday, August 21, 2006 - 02:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check for cupped tires, even if they are relatively new. Also, check for proper inflation.
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Impulse_101
Posted on Monday, August 21, 2006 - 02:20 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Tire pressure is good. I was thinking about the bearings myself, but I havn't checked them yet, and since I don't have a way to jack the bike up I'll have to work on that one.

The rear shock is a good idea too. I'm riding the same settings that I've lived with for three years but that doesn't mean that things havn't changed, it just means that I didn't turn the screw.

The tires look great. They are inflated correctly, no cupping or anything else for that matter. At least not that I can tell from examining them while the back tire is on the ground.

No leaks either, I just changed the oil and primary fluid this weekend but it's not dripping and the problem started prior to that.

JT
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Josh_
Posted on Monday, August 21, 2006 - 03:05 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check belt tension. If too tight it will act as part of the suspension.
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Hans
Posted on Monday, August 21, 2006 - 04:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Check also the shocks at the front end:
What Bomber said:

" -- with two wheelers AND four, what can feel like a problem at one end of the beast is often caused by the other end --"

Hans
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Dfbutler
Posted on Monday, August 21, 2006 - 06:14 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Two words - wheel bearings! I had one of my rear bears fail catostrophically leaving me and my 99 S3T stranded at the side of the road. Check both front and rear wheel bearins. My S3T has 2 sets of bearings on one side of the rear wheel some one may be going out.
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Smadd
Posted on Wednesday, August 23, 2006 - 09:48 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I'd also recheck the isolators very carefully. A bad isolator would definitely give you that feeling. When riding upright and hitting a dip in the road, does the suspension seem to respond with a "graunching" sound and seem too mushy? Have you ridden with a passenger and taken a (gentle) ride? Bad isolators would show up more readily then.

Steve
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