Inside a repaired electric motor there are many original components as well as those that have been replaced or repaired and not only is the quality of those being replaced important, so too is the handling and processing of the original components otherwise you might be getting back a bomb...
The current limit of a DC motor drive can be set at up to 200% of rated motor current for the purpose of overcoming starting inertia, or torque, and yet it is often set at only 100% due to misconceptions about perceived protection...