179 Motorcycle Turns

The height of the center of gravity of a motorcycle and rider is often about 24 inches off the ground. When a motorcycle makes a turn, the lean of the rider and motorcycle must equalize the centripetal force in the following way:

where 6 = angle of lean (as measured from the vertical), W = weight of the motorcycle and rider, and a = height of the center of gravity when fully upright.

Equation (xxix) reduces to the following:

While professional riders may lean as much as 45 degrees from the vertical to take a turn, most riders usually don't lean more than about 20-25 degrees from the vertical. Inexperienced riders may lean less than 15 degrees from the vertical.

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