Mini 4WD Sprint Dash motor, broken in. If you purchase multiple motors, we will offer a discount of 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 reverse rotation for FM use. Rotation speed: 42797rpm 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 were 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 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 also run reasonably well if brakes are not applied, can be used with 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 becoming even faster on flat surfaces, heat fatigue during continuous running, such as from sudden braking and races, becomes a concern. It is necessary to be conscious 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.