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FJR Motorcycle Forums
Technical & Mechanical Problems
Steering Bearing and Head Shake
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<blockquote data-quote="wfooshee" data-source="post: 1416871" data-attributes="member: 6354"><p>Head shake is just worn tires in general, not one tire versus another. (Probably mostly. <img src="https://www.fjrforum.com/forum//public/style_emoticons/default/smile.png" alt="" class="fr-fic fr-dii fr-draggable " style="" /> ) As the tires wear, the centerline of the contact patch shifts unevenly, resulting in an application of caster. Sometimes the tire contact is left of the centerline, sometimes right. That offset turns the steering if it's not held by your hands. Braking makes the effect stronger.</p><p></p><p>I submit that nearly everyone who said they switched tire brands to solve it, actually solved it just by mounting a new tire, no matter what brand. If one brand of tire wears more evenly, keeping a good centerline, then yay for you. It might be wearing more evenly because after the experience, you're keeping a closer eye on tire pressure.</p><p></p><p>I'm not saying head bearings have nothing to do with it, but "loose" bearings make it easier to shake. Still caused by uneven centerline of the front tire.</p></blockquote><p></p>
[QUOTE="wfooshee, post: 1416871, member: 6354"] Head shake is just worn tires in general, not one tire versus another. (Probably mostly. [IMG]https://www.fjrforum.com/forum//public/style_emoticons/default/smile.png[/IMG] ) As the tires wear, the centerline of the contact patch shifts unevenly, resulting in an application of caster. Sometimes the tire contact is left of the centerline, sometimes right. That offset turns the steering if it's not held by your hands. Braking makes the effect stronger. I submit that nearly everyone who said they switched tire brands to solve it, actually solved it just by mounting a new tire, no matter what brand. If one brand of tire wears more evenly, keeping a good centerline, then yay for you. It might be wearing more evenly because after the experience, you're keeping a closer eye on tire pressure. I'm not saying head bearings have nothing to do with it, but "loose" bearings make it easier to shake. Still caused by uneven centerline of the front tire. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Steering Bearing and Head Shake
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