Ill fitting pads can cause a knock, as can the outside part of a floating brake disc.
If it's a heavy knock that you can feel in the handlebars then it might need a little tightening at the top end. (steering head)
If it's a heavy knock that you can feel in the handlebars then it might need a little tightening at the top end. (steering head)
More people are born because of alcohol than will ever die from it.