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FJR Motorcycle Forums
Technical & Mechanical Problems
Seals for Timken or other tapered roller steering head bearings?
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<blockquote data-quote="Klikoo" data-source="post: 1455692" data-attributes="member: 97860"><p>Shimmy is a complicated phenomenon that can have several causes. Frequency is around 10Hz and usually occurs at about 75Km/hr. Nose wheels on aircraft during landing can also suffer from it, and every effort is made to prevent it. The most obvious cause in motorcycles is dynamic imbalance in the front wheel or a top box. You should always balance wheels dynamically and not statically on a balancer. Shimmy can even be seen on a shopping cart swivel wheel. The advantage of a tapered roller bearing is that it has a little more friction to prevent shimmy starting up. I myself have also installed tapered roller bearings, but it is almost never the cause of shimmy. But if it helps prevent shimmy's startup, why not?</p></blockquote><p></p>
[QUOTE="Klikoo, post: 1455692, member: 97860"] Shimmy is a complicated phenomenon that can have several causes. Frequency is around 10Hz and usually occurs at about 75Km/hr. Nose wheels on aircraft during landing can also suffer from it, and every effort is made to prevent it. The most obvious cause in motorcycles is dynamic imbalance in the front wheel or a top box. You should always balance wheels dynamically and not statically on a balancer. Shimmy can even be seen on a shopping cart swivel wheel. The advantage of a tapered roller bearing is that it has a little more friction to prevent shimmy starting up. I myself have also installed tapered roller bearings, but it is almost never the cause of shimmy. But if it helps prevent shimmy's startup, why not? [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Seals for Timken or other tapered roller steering head bearings?
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