The five most popular story-specific questions about Motorheads Season 1 Episode 10 'Redbird' are: 1) Is Zac ready for the big race with UNB10? 2) What risk does Marcel take in this episode? 3) How does Curtis confront his father? 4) What is Logan's plan to escape Ezra's scheme? 5) How does Kiara stand up to her mom? These questions focus on key character developments and plot points within the episode, such as Zac's preparation for the race, Marcel's leap of faith, family confrontations, and personal challenges faced by the main characters.