Why do motorcyclists put their leg out?

Why do motorcyclists put their leg out?

Dangling your leg into this high-speed airstream results in a significant force on the rider’s leg as it acts like a small parachute, creating a turning moment by pulling the riders leg around his core. This in turn encourages a pull on the outside handlebar, further helping to turn the bike through counter-steering.

See also  How many cc should a beginner bike have?