A frame slider mounted to a Suzuki GSX-R750. Manufacturer: BS-Motoparts
Fork sliders (left), bar end sliders (center) and frame sliders (right) on a Ducati SportClassicFrame sliders, also called frame protectors, fairing protectors, or crash bobbins, are an accessory used on street motorcycles for the purpose of maintaining the bike's side fairings and internal components in the event of a crash, or preventing damage from dumping (dropping) the bike. The frame sliders are usually located and installed on the engine bolts on the left and right side fairings. The average frame sliders will run about 30 to 50 US Dollars.
Along the same lines, plastic, or other polymer, sliders are sometimes added to motorcycle bar ends, and to front or rear axles, called fork sliders and swingarm sliders. These provide some potential damage reduction for the suspension components, wheels, and other parts by making contact with the ground before the rest of the bike. Hard-mounted foot pegs, which do not fold upward as normal original equipment foot pegs do, can also serve as a buffer between the ground and the bike's frame and components.
Information :- Wikipedia.
Photos :- Internet.