Friends, hello to all. The weakest point of these motors is the insulator, it melts very easily even under small overloads. Because of this, the winding wire begins to touch the stator iron, its insulator wears out and the motor burns out. And this often happens with other motors that were used in modes exceeding the rated power. Rewinding the motor will make it much more reliable and better. There will be a new good reliable insulator and a much better quality winding itself. You can even change the number of cores and turns in order to select the properties of the motor for your tasks, making it either more traction or faster. This motor had 5 cores and 13 turns, became 6 cores 10 turns. The difference was quite noticeable. On the tested bike, this motor previously accelerated it to 25 km / h in a star and up to 33 km / h in a triangle. After rewinding in the star 33 km per hour in the triangle 45 km per hour in a straight line without wind. Current consumption and heating also increased proportionally. But the traction became less than it was, it was in excess, and became sufficient. The acceleration dynamics became noticeably more lively. This motor was overheated not on this bike, but on the bike that I made one of the first, on the channel it is the very first. Then I decided to make it in a 27.5 motor wheel. It did not burn out then, but simply melted the insulator, because of this already on the new bike and failed. In new versions of bicycles, when the drive is from a conventional V-belt, the motor does not overheat, since the gear ratio is 1 to 3 or more, and the motor spins up more and is close to its nominal operating modes. The bicycle tested in this video has the largest driven pulley 400 mm, that's why it is so slow. I made it before winter to test the traction in the snow. It goes up a hill in 20 cm of snow here is a video of the tests • Electric bicycle from a gyro scooter. Test ... On another bike, • Electric bicycle from a gyro scooter! 27.5 this motor before rewinding in a triangle went 52 km per hour on a sine controller, I have not tried it on a rewound one yet, since there are no brakes. I think that it will go all 60. As an insulator I use thermal tape and other recommendations of Kirill Kholodov, I highly recommend his channel, he rewinds motors and other interesting homemade products and life hacks / @KirillKholodov In the end, I am a little disappointed with these motors, in the sense that I thought that this is a good alternative to expensive motor wheels. So that anyone could simply install it on their bike without rewinding it. Most likely, such an insulator is weak because the Chinese save on everything to make the cost lower, or, most likely, they already have such a strategy, to find a weak point, make it even weaker, so that the device fails as soon as possible and they buy it again. The saddest thing is that I have encountered exactly the same insulator in other motors, both direct drive and geared. So, sooner or later, all motors that are operated with excess of their temperature conditions will encounter rewinding. And as practice shows, the limits of these modes are not enough, you want to drive more briskly.