Motor weakness is a feeling of undependability of the joint that the muscle crosses. For example, if the L5 nerve was compressed, the tibialis anterior would be weak. This muscle lifts the foot when walking so weakness would be demonstrated by a slapping of the foot on the ground when you step on the leg.
If the L3 or L4 nerve would be involved, the knee would collapse when ascending or descending a curb or stairs. Pain inhibition does not count as weakness.
You do have some numbness but this is a sensory nerve involvement and not to be too concerned.