Hello gentlemen, thank you for your opinions.
As the bike is still under warranty, I decided to stop reaching for it and take it to the local RE dealer, who I doubt has technical support up to the task. After leaving the bike there for two days, they inform me that they "fixed" the problem: they just increased the RPM by touching the gold air intake screw. Now the behavior of the motorcycle is as follows:
1.Starts with a cold engine and when releasing the accelerator it does not maintain idle and turns off. I was instructed to hold the 2000 rpm on the throttle for two to three minutes to warm up.
2. After those minutes operating the accelerator, when releasing it the motorcycle regulates at 1500 rpm (although irregularly).
3. When driving and testing on the street, it no longer turns off in the corners because it has more revolutions, but then with the engine warm the motorcycle regulates at 2000 rpm. If I turn off the engine and restart it, it stays at 1500 rpm for two minutes and automatically goes back up to 2000 rpm and there it stays. In other words, they did not solve anything, of course they charged me for the "service".
I claimed that abnormal behavior (it was just Friday) and they told me that I will take the bike the following Monday. They say they will continue to "regulate." I think they will continue to play with the golden screw. I still think it is an air leak and maybe a manufacturing defect in the throttle body. The problem was present from the first day 1, I feel cheated and angry because I should not have received the motorcycle in those conditions, all the time they tried to convince me that the operation of the motorcycle was "normal". Will I have to take the bike again as many times as necessary until they admit and recognize the real problem? I do not know what to do. Saludos!!!!