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Cure the wobble...
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<blockquote data-quote="davidd" data-source="post: 96463" data-attributes="member: 1177"><p>There are lots of different ways to get into a wobble. It does not seem possible to eliminate all of them. The Vincent was subjected to some extra scrutiny because it got a reputation for wobbling. Although you can't eliminate all causes, there is no good reason not to eliminate the conditions that may induce a wobble, such as breaking the link between braking and the front end seizing. </p><p></p><p>Ultimately, most wobbles seem to have one thing in common: the front getting light. This can happen almost imperceptibly when the front end seizes and the tire starts to "patter" or it can be intentional as in the many wobbles that happen when a wheelie touches down a bit out of alignment with the rear tire. However, you can also just whack one grip of the handlebars and induce a wobble with no weight change at all.</p><p></p><p>The Murray video is very interesting, but when he said to lean forward to change the weight on the front end it sounded like it made sense if you want to thwart a wobble. I think doing so may change the center of gravity a bit even though much of the weight is still going through the seat. But, I thought Murray was wrong. The rider, when getting into a tuck is changing the center of pressure, not so much the center of gravity. I thought it had more to do with aerodynamics causing a change in pressure than weight shifting causing the change. It seemed to me that when you are upright you are presenting yourself as a giant sail and that sail is in front of the center of gravity. That is a recipe for disaster because a lot of instability is created when the CoP is in front of the CoG in an airplane, car or motorcycle. When the giant sail goes away on the motorcycle by tucking the instability goes away. </p><p></p><p>I don't know enough to know if this is correct or partially correct, but Bill might be right. You may have to pass on the sweets after all.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 96463, member: 1177"] There are lots of different ways to get into a wobble. It does not seem possible to eliminate all of them. The Vincent was subjected to some extra scrutiny because it got a reputation for wobbling. Although you can't eliminate all causes, there is no good reason not to eliminate the conditions that may induce a wobble, such as breaking the link between braking and the front end seizing. Ultimately, most wobbles seem to have one thing in common: the front getting light. This can happen almost imperceptibly when the front end seizes and the tire starts to "patter" or it can be intentional as in the many wobbles that happen when a wheelie touches down a bit out of alignment with the rear tire. However, you can also just whack one grip of the handlebars and induce a wobble with no weight change at all. The Murray video is very interesting, but when he said to lean forward to change the weight on the front end it sounded like it made sense if you want to thwart a wobble. I think doing so may change the center of gravity a bit even though much of the weight is still going through the seat. But, I thought Murray was wrong. The rider, when getting into a tuck is changing the center of pressure, not so much the center of gravity. I thought it had more to do with aerodynamics causing a change in pressure than weight shifting causing the change. It seemed to me that when you are upright you are presenting yourself as a giant sail and that sail is in front of the center of gravity. That is a recipe for disaster because a lot of instability is created when the CoP is in front of the CoG in an airplane, car or motorcycle. When the giant sail goes away on the motorcycle by tucking the instability goes away. I don't know enough to know if this is correct or partially correct, but Bill might be right. You may have to pass on the sweets after all. David [/QUOTE]
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Cure the wobble...
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