i have 12k on my cs. started noticing a slight bump?(almost feels like right rear tire "bumping" over a small pebble)when i make start to move, usually after hard riding and a hard stop. its the kinda thing that you think you are imagining, but really know your not. its extremely slight. could it be tranny or maybe brakes? any opinion would help as service here needs a helping hand or a long wait from factory.