I’ve fitted a new motor to the left hand side to Bebop2. Went to fly it and it just banked to the left big time
Please show us some picutures how you connected everything up and please provide a link so we know which Motor you chose…
My guess would be that the Motor is spinning in the wrong direction or there is a connection issue…
Luca 
Your right the motor is running the wrong way. Now in touch with supplier. They asking me to send photos of top and bottom of new motor. Why I don’t know
Curious !!
Please let us know the outcome
Hope you are back flying soon
Cheers
Steve