This is actually a story ahead of its time. Captain America can’t ride motorcycles any more because the last time he did it was with Bucky, and it brings back the memories of his death. He buys a bike, goes after a Wild-Bunch-ish gang, and beats the snot of them, and then he’s happy and free again. Yeah, it’s a simplistic approach to Post-Traumatic Stress Disorder, but it’s important to remember that PTSD didn’t even exist when this comic was made–it wasn’t a recognized disorder until years later. This was written when boys were coming back from Vietnam emotionally destroyed, and movies like Coming Home were considered groundbreaking.