• You can motorize your mountain bike, but you'll need a special license in California.bicycle image by Sergey Danilov from Fotolia.com
  
  In California, two- or three-wheeled cycles that go less than 30 miles an hour are classified as motorized bicycles. Motorized bikes in California require a special M-2 endorsement on a drivers license to ride. Licensed and unlicensed drivers need to get a permit to take the test and pass a written and field test to get the license. Anyone over 15-1/2 can get a permit to learn to drive in California.
  
  

Equipment Requirements

• Bicycles can be equipped with electric or gas motors that will do the peddling for riders. Gasoline and electric bicycles are permissible on California roads and streets. Anyone can ride a bicycle in California without a license, but motorized bicycles have to be registered with the Department of Motor Vehicles, the serial number of the bicycle noted on the form, as well as the serial number of the motor. Motor bicycles in California are considered mopeds and registrants use that form for mopeds to register their bikes.
  
  

Getting the Permit and License

• Permits applications are available from local Department of Motor Vehicle offices. Applicants have to visit the office nearest them to complete the forms, get fingerprinted, and have their social security numbers verified before a license or permit will be issued. The permit is good for 12 months.
  
  Permitted drivers must study the materials the DMV provides in order to pass the written test and they must also demonstrate proficiency riding the motorized bicycle in order to pass the exam to get a license.
  
  

Road Rules

• Motorized bicycles cannot be operated on bike paths, trails, bikeways, hiking or recreational trails unless the local jurisdiction has approved the use of that pathway for motorized bicycles. All bicycles must have an operable braking system.
  
  If riders want to use bike lanes to ride, they must not do so at excessive speeds that could cause harm to other riders.
  
  Riders cannot use their motorized bicycles on freeways, ride at night without lights and reflectors in working order, ride under the influence, or hitch rides from other vehicles while on the bicycle.
  
  One hand has to be on the handlebars at all times. Riders under 18 have to wear helmets certified by the United States Consumer Product Safety Commission (CPSC) or the American Society for Testing and Materials (ASTM).