Hello, have bought my daughter a China scooter AGM GMX 450, from a estate. First registration 01.08.2017, 45 km/h registration and only 360 km run. Now to my problem If the scooter is cold, it runs great, attracts well, reaches approx. 48 km/h, so nothing to complain about. If it gets warm, about 10 – 15 minutes long, it doesn’t attract any more, does not want to go, seems to me as if it doesn’t want to take gas. If I push the scooter something on, then it slowly starts stuttering, From about 10 km/h it goes again.Now it comes to me:If I pull off the cable for the speed sensor, it runs perfectly, pulls great on etc…… but he now drives 65 km/h, so much too fast. Should run max. 45 km/h +- 2 km/h, so what he is allowed to do according to papers. I connect the cable again, the problem is there again. Thought to me, CDI defective, so the CDI is removed from my son’s scooter (Rex Boston 8, Bj 2012 with 25 km/h) and incorporated into the AGM scooter. with (28 km/h) but the same problem persists, with warm engine, it does not attract when starting, as if the CDI, as with the original 45 km/h CDI, regulates or down. I now pull the cable apart again from the sensor, runs and pulls it again easily, as it should be, only unfortunately it runs 65 km/h again. The sensor will probably not be, because the problem only occurs when the scooter has been driven a few km warm, in cold condition warranty = missing, according to AGM the first inspection has to be done after 300 km (so already 60 km above) or at the latest after 4 weeks (so also here already 2.5 months above) Sad but true, no guarantee by AGM would be great, if one can help me with this problem.