DaveMossTuning.com
Technically, gears are toothed wheels which transfer power one to another by direct contact. Sprockets are toothed wheels which transfer power one to another via an intermediary device like a chain. Regardless, we motorcyclist Neanderthals refer to altering the ratio between any 2 types of wheels as changes in "gearing". On a motorcycle this can be done inside the transmission like an automobile, but is most commonly done outside of it via the sprockets.