Originally Posted by johndriver

Hi

I just got a slightly used B5m and with it came a Reedy Sonic motor. The seller told me that it had a different rotor in it that was for 1s batteries. In a container he had the one for 2s.
I began to change them and found that the supposed 2s rotor does not fit either the bearings at each end of the motor.

I went on to Associated's site and there are many different rotors but no information on them.

The rotor that fits has written on it: Reedy Sonic s12.3 x 25.0. On the flat part of the shaft is the Associated id number for the rotor on the site which is 955.

Can anyone explain what is going on here?
Thanks, in advance.
John