Mini 4WD Sprint Dash motor, broken in. If you purchase multiple motors, you will receive a 200 yen discount per additional item! Example: 2 items purchased together = 200 yen off, 3 items = 400 yen off Broken in with reverse rotation for FM use. RPM: 40455rpm No-load current draw: 1.0A 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 end bell Measurements are taken under the above conditions, but please understand that there may be slight variations in the numbers due to the time elapsed since listing, shipping conditions, and the measurement environment before purchasing. ※Based on personal experience, I feel 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, I feel that the Sprint Dash brushes are not very durable, so I recommend replacing them when you feel the torque is diminishing. • 37000-38500rpm (0.8-0.9A is average) Torque remains somewhat, battery consumption is moderate, alkaline batteries perform reasonably well if brakes are not applied, can be used with nickel-hydrogen batteries in layouts that require sudden braking, or layouts with long distances. • 38500-40000rpm (0.8-1.1A is average) Very fast on flat surfaces, and I feel 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 becoming even faster on flat surfaces, heat fatigue becomes a concern during continuous running, such as from sudden braking or in races. It becomes necessary to manage batteries and, in some cases, to cool the motor. • 43000 or more (I think it will be 1.3A or more) Tends to lose torque, so it will be faster in layouts with shallow braking or long flat surfaces. Also, motors with a no-load current draw exceeding 1.5A may have excessive current due to initial defects or failures during use. Also, I do not recommend it because there is a possibility of being suspected of doing something at race venues where experienced people gather, and it is not balanced in terms of heat generation and power consumption.