This permit can then be upgraded to a license once you are old enough and have passed some further tests. However, if you are under 16, you can still apply for a permit. You need to be at least 16 years old to get a motorbike license. You can apply for your motorbike license at any Department of Public Safety exam office. If you already have a driving license for a car, you can add an endorsement by taking the vision test and knowledge and skills tests. If you want to ride a motorbike in Oklahoma legally, you need a motorcycle license or permit.