1500 non-typical wobble.


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dingdong
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1500 non-typical wobble.

Postby dingdong » Wed Feb 01, 2012 9:35 am



My 93 1500 developed a wobble last year. Seems like it was good one day and wobbly the next. Not the typical decel wobble that a lot of Wings have. It wobbles mostly on acceleration up through 30 mph. Just slightly at sustained speed of about 25. On turns especially left turns it is even more noticeable. I have rebuilt the front brakes the forks and steering head bearings, I have Progressives springs and a Super Brace. No change what so ever. I Just installed a new front tire even though the old one wasn't ready to be replaced yet. No change. Now my question is: I have heard that a rear tire can cause a wobble. Has anyone ever experienced a rear tire causing a wobble like this? It is an E3 and cupped somewhat. Suggestions please. I'm stumped.


Tom

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virgilmobile
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Re: 1500 non-typical wobble.

Postby virgilmobile » Wed Feb 01, 2012 10:18 am

Nothing like that on mine,but I'd be looking at wheel bearings and alignment.Yes,just like a car,the front and rear wheels must track in a true line.I've used a nylon string front to rear,both sides to align the bike.Out of alignment would explain the cupping and wobble.

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D2D
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Re: 1500 non-typical wobble.

Postby D2D » Wed Feb 01, 2012 10:34 am

Have you checked swing-arm bushings for wear?

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Re: 1500 non-typical wobble.

Postby WingAdmin » Wed Feb 01, 2012 10:39 am

I'd look at wheel bearings as well.

When I put new tires on my 1100 a while back, I suddenly got a weave/wobble that started at about 65 mph and got worse as speed increased. It turned out that the pivot pins in the swingarm had been installed backward by a previous owner, and as a result the swingarm had lateral free play. The old (worn flat) rear tire had enough friction-induced caster to it to keep the swingarm from moving around. But the new tire, with its nice round profile, allowed the swingarm to move around, causing the problem.

Removing the pivot pins (checking the bearings, which were fine), inserting them correctly, and torquing them down correctly solved the problem.

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dingdong
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Re: 1500 non-typical wobble.

Postby dingdong » Wed Feb 01, 2012 12:51 pm

I haven't done anything to the rear yet. That is the next step. I have checked the front bearings also they check good.
Tom

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Re: 1500 non-typical wobble.

Postby furnacedoc » Wed Feb 01, 2012 4:54 pm

Hello, I had a small bulge in my rear tire that was only noticed at lower speeds when i turned to the side that had the bulge. I replaced the tire imediately

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Re: 1500 non-typical wobble.

Postby bustedwing » Wed Feb 01, 2012 7:30 pm

If the swing arm bushings are worn the low end torque as you go thru the gears will cause twisting and throw off the alighnment from front to rear, which is how the wobble effects the steering. If you jack up the rear end and try to move the swingarm assy, side to side you should see very little movement.


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