Thanks for all your help guys. I was at the LHS and we checked the motor- it seems that the rotor is damaged. I have a LRP Vector X12 7.5 motor and an LRP SXX TC esc. The sent the rotor to LRP. WeŽll see if they will change it but i think so.
In the meantime i put in a 5.5 rotor but didnŽt have the chance to check if it works now because it was raining all days long. Also my NIB TRF201 arrived and i had to build it the same day i got it! Just gotta love that design. The car is very well engineered and the body looks awesome i think.