Mini 4WD Sprint Dash motor, broken in. If you purchase multiple motors, you will receive a 200 yen discount for each 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 reverse rotation for FM use. Rotation speed: 40374rpm 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: Rotation speed 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 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, I feel that the Sprint Dash has 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 somewhat, battery consumption is moderate, and it runs reasonably well with alkaline batteries if you don't apply brakes. Usable for layouts that require sudden braking with nickel-hydrogen batteries, or 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 becoming even faster on flat surfaces, heat fatigue becomes a concern during continuous running, such as from sudden braking and races. It becomes necessary to be mindful of battery management and, in some cases, cooling 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, those with a no-load current consumption 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.