[Eng Sub][mini4wd] Motor Break-in Carbon brush ed.

I tried to make a motor break-in method into a video.
But this is not the correct answer.
I think the way of thinking is important.
【ミニ四駆】モーター慣らし カーボンブラシ編
• 【ミニ四駆】モーター慣らし カーボンブラシ編