What is the age to drive 2001 Kawasaki KX65?

The KX65, as you probably know, is a dirt bike which means that in most states there is not a listed minimum age. It more depends on how tall you are. The seat height is listed at 29.9 inches. To be safe you should be able to stand flat footed on at least one side if not both. I've seen kids as young as 3 years old riding small bikes. I would say it will differ greatly depending on how good of a rider the person is. Check out Kawasaki.com if you want more specifications on the bike. Have fun!