Grinding feeling from rear wheel

[rules]

Hi All

So I went for a ride earlier after fitting my LED headlights and I noticed something strange on the way back.

When I'm sitting upright and going in a straight line I feel no abnormal vibrations but as soon as I start leaning over (going into a bend) I get this weird grinding like vibration through the footpegs (and no I'm nowhere near dragging them on the road ). It's most notable when off the throttle but it's also there when on.

Is this normal or should I be worried?

Thanks,
R


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