Mini 4WD Sprint Dash motor, broken in. If you purchase multiple motors, we will discount 200 yen per additional item! Example: 2 items purchased together for a total discount of 200 yen, 3 items for a total discount of 400 yen. Broken in with forward rotation. RPM: 39567rpm No-load current consumption: 1.2A Measurement conditions: Measured after more than 24 hours after break-in, with the motor's temperature naturally cooled in a place not exposed to sunlight, and after applying a 3V voltage for approximately 30 seconds. The photos are as follows: First photo, current value Second photo, RPM Third photo, image of the motor's end bell Please understand that there may be slight variations in the numbers due to the time elapsed since listing, the impact of shipping, and the measurement environment. ※Based on personal experience, I feel that the break-in condition of the Sprint Dash has the following tendencies (of course, there are individual differences, so this is just a tendency). Also, the Sprint Dash seems to have weak brush durability, so I recommend replacing it when you feel the torque is diminishing. •37000-38500rpm (0.8-0.9A is average) Torque remains, battery consumption is moderate, alkaline batteries run reasonably well if you don't brake, can be used in layouts that require sudden braking with nickel-hydrogen batteries, and layouts with long distances. •38500-40000rpm (0.8-1.1A is average) Very fast on flat surfaces, and I feel that the balance of speed, torque, and heat resistance is good in 3-lane high-speed layouts. •40000-42000rpm (0.9-1.2A is average) While the flat surface becomes even faster, heat fatigue from sudden braking and continuous running in races becomes a concern. It is necessary to be aware of battery management and, in some cases, cooling the motor. •43000 or more (I think it will be 1.3A or more) Torque tends to diminish, so it will be faster in layouts with shallow braking or long flat surfaces. Also, those with a no-load current consumption exceeding 1.5A may have overcurrent due to initial defects or failures during use. Also, it is not recommended because there is a possibility of being suspected of doing something at race venues where experienced people gather, and it is not recommended considering the balance of heat generation and power consumption.