The leg brace that Raven wears is supposed to be on her left leg, but in the garage, when she is kneeling next to the motorcycle, it's on her right leg.
Raven was born in space and would never have had experience with a gasoline-powered internal combustion engine on the station. When they arrived back on Earth, the few vehicles they operated were apparently electric-powered based on their operation, so she would not have any experience with a fuel-intake system on a motorcycle with an internal combustion engine (the motorcycle on Sanctum was stated to run on ethanol), and would not have recognized the symptoms by sound.