'Motive' is normally used to mean the specific reason for performing a specific action, an incentive, a particular goal or objective 'They ran away to avoid being punished.' (motive = to avoid being punished). 'Motivation' is either a) the act or process of giving someone a reason to do something, the internal and external factors that stimulate desire to do something 'I became a vet so that I could help relieve suffering in animals.' (motivation = the desire to relieve suffering in animals) or b) the condition of being eager to do something or work. 'Some employees lack motivation.'

motive= a reason for doing something motivation = a feeling of enthusiasm or interest that makes you "determined' to do something Your determination makes the difference.

These two words are so different. I think you can find the answer in a dictionary.