It's your bike! But, to reassure you, it's the same with all of them.....there is a rubber mount in the bar clamp fixings which causes this movement. It can be unnerving until you realise that it's supposed to happen!
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Could be due to tire wear too, I would venture to guess that the Pirelli tread has potential to develop tread cupping that can cause the wobble described. If you run your hand over your tire, front to back you will likely feel the trailing edge is raised and the alternating block design will cause a vibration that will become a wobble if not holding the bars (coast down hands off) and can be felt if the cup is large enough. We had some Gold Wing riders report that wobble in as few as 500 miles. It was always if they took their hands off the bars though and even the lightest of touch on the bars would stop the wobble.
It happens because the rotational forces on the front tire are uni-directional. The braking as well as the normal rotation resistance due to friction are only one way. The back tire has a different type of cupping, being side to side due to the direction of forces from cornering. The forces of acceleration and deceleration/braking work opposite directions so this fore aft cupping doesn't happen on the back.
Here's an extreme example of the extreme wear on a front tire:
![24887]()
I haven't experienced any vibration with my bike and I have raised the forks in the triple clamps 10mm and may go to 20mm, to quicken turn in. That would ordinarily increase possibility of wobble, but I have no problem. I like my bikes to have quick handling. I will have to wait and see when the tires wear enough to cause the feeling.
It happens because the rotational forces on the front tire are uni-directional. The braking as well as the normal rotation resistance due to friction are only one way. The back tire has a different type of cupping, being side to side due to the direction of forces from cornering. The forces of acceleration and deceleration/braking work opposite directions so this fore aft cupping doesn't happen on the back.
Here's an extreme example of the extreme wear on a front tire:
I haven't experienced any vibration with my bike and I have raised the forks in the triple clamps 10mm and may go to 20mm, to quicken turn in. That would ordinarily increase possibility of wobble, but I have no problem. I like my bikes to have quick handling. I will have to wait and see when the tires wear enough to cause the feeling.
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