(2) HV4.5 motors 1 is considerably slower. Worn out rotor?

[Gee]

Thanks. I was looking up prices for the sintered rotor and found for only another 8.00 or so I could get the motor replaced with a remanufactured one. Not knowing for sure if it is a rotor problem. That may be the best route to take. I got a 6.5 I can use until I get the other one back. Besides the bearings and rotor is there anything else too a brushless motor that is servicable?