two different people told me its either the one way gear on the right side of the motor or I needs new bearings. replacing the one side my mechanic should be able to do it. but I am worried that the other sides bearings need replaced or all of them thats a whole different level and needs a shop that setup for it. but with 14k miles on it I am worried if it did not get a full bearing replacement it would not be a long term repair. I have my spare bosch powered bike that I dont really use and I will see if he can just swap motors. that would save me 900.00 for a new motor.