This is a list of street legal production motorcycles ranked by acceleration from a standing start, limited to 0 to 60 mph times of under 3.5 seconds, and 1⁄4-mile times of under 12 seconds. Concept, custom, modified, and one-off motorcycles of any kind are not listed, nor are racing-only motorcycles. The widely varying testing methodologies mean that, even between identical motorcycles, the acceleration times vary. Some of these differences include: rider skill and launching technique, measuring equipment, track surface conditions, weather, air temperature, and altitude.