A basic motor for radio control car use.Both power and efficiency are combined with durability.Can be used for spare motor of stabdard 540 type motor.This motor can be used in Tamiya official ra-ces.Use standard pinion gear provided iTuned motor best for sprint race use. Employs lay-down type brush holder that enables firm contact with commutator. Motor features many slits on its surface and excels in heat dissipation. Brush dampers increase adhesion of brush and commutator, and terminal heat sinks each of which is colored in red or black to match to motor cables are also adopted. Can be taken apart and re-built. Check brushes after use 10-15 full battery packs. When replacing brushes, make sure to inspect the commutator as well. Change the rotor to a new one if the commutator is badly burnt, scoured, or grooved. The motor should be broken-in after installing new brushes.