This is the Photon Speed 2 Motor (20 turn, single wind) from Duratrax. This is the stock motor found on the Duratrax Evader EXT. COMMENTS: BREAK-IN For proper break-in, use a 3-5V power source, run the motor with no load. The contact patch should take up at least half of each brush's surface. Do NOT use more than 5V power, as the commutator may be damaged.