Whether you need a license depends on your state and how powerful the motor is
Most states do not require a license to ride a motorized bicycle if the motor is small enough and the bike meets specific rules. The cutoff is usually 50 cubic centimeters (cc) of engine size or 750 watts of motor power, though some states use different limits. If your motorized bike stays under that threshold and has working pedals, you can ride it in most places without a license or registration.
The catch is that states define "motorized bicycle" differently, and some cities add their own rules on top of state law. A bike that is legal in one state might be classified as a moped or motorcycle in another, which would require a license. You need to check both your state's rules and your local city or county rules before you ride.
Key Takeaways
- Most states exempt motorized bicycles under 50cc or 750 watts from license requirements, but the exact limit varies by state.
- Your motorized bike must have working pedals and meet other equipment standards (lights, brakes, reflectors) to count as a bicycle rather than a moped.
- Some cities ban motorized bicycles entirely or restrict where you can ride them, even if your state allows them.
- If your motor is larger than the state limit, you will need a motorcycle or moped license and the bike must be registered.
How states classify motorized bicycles
States use one of two main measurements to decide whether a motorized bike counts as a bicycle or a motorcycle. Some states set a 50cc engine size limit — if your motor is 50cc or smaller, it is treated as a bicycle. Other states use 750 watts of electric motor power as the cutoff. A few states use both limits, meaning your bike must stay under both numbers.
California, for example, defines an electric bicycle as having a motor of 750 watts or less and a top assisted speed of 28 miles per hour. New York allows motorized bicycles up to 50cc with a maximum speed of 20 miles per hour. Colorado permits electric bikes up to 750 watts with no speed limit in the definition itself, though local trails may have their own rules.
The bike also has to have working pedals — this is the rule that separates a motorized bicycle from a moped or motorcycle. If the motor can propel the bike without pedaling, most states will classify it as a motorized vehicle that requires a license, even if the engine is small.
Equipment your motorized bike must have
Beyond the motor size and pedal requirement, your motorized bicycle needs to meet basic safety equipment standards to stay in the bicycle category. These rules vary slightly by state, but most require a working brake system on both wheels, a headlight and taillight that work at night, and reflectors on the pedals and wheels.
Some states also require a bell or horn, and a few specify that the bike cannot be wider than a certain measurement or cannot have a seat for a passenger. Check your state's vehicle code or your local police department website for the exact list — many departments post a one-page summary of what is and is not allowed.
If your motorized bike does not meet these standards, it may be reclassified as a moped or motorcycle, which means you would need a license to ride it legally. The equipment rules exist partly for safety and partly to keep motorized bicycles visually distinct from actual motorcycles.
When you need a license even with a small motor
If your motorized bike exceeds your state's size or power limit, you will need a motorcycle or moped license to ride it legally. The type of license depends on the engine size and your state's rules. Some states issue a separate moped endorsement for bikes under a certain size (often 50cc), while others require a full motorcycle license for anything over the bicycle threshold.
To get a motorcycle or moped license, you typically have to pass a written test about traffic laws and motorcycle operation, and a riding skills test. Some states allow you to take a motorcycle safety course instead of the riding test, and completing the course often lowers your insurance costs. The process takes a few weeks to a few months depending on how quickly you schedule the tests.
Your motorized bike will also need to be registered with your state's motor vehicle department, and you will need to carry proof of registration and your license when you ride. Insurance is usually required as well, though some states exempt mopeds under a certain size from the insurance requirement.
Local rules that override state law
Even if your motorized bicycle is legal under state law, your city or county may have stricter rules. Some cities ban motorized bicycles entirely, while others allow them only on certain streets or prohibit them on bike paths and trails. A few cities require a local permit even for bikes that do not need a state license.
Parks and trail systems often have their own rules separate from city law. A motorized bicycle might be legal on city streets but banned from the local rail trail or mountain bike park. Before you buy or ride, check your city's municipal code and call your parks department to ask about trails and parks you plan to use.
The easiest way to find local rules is to contact your city's police department or public works department and ask specifically about motorized bicycles. Many departments have a written policy they can email you, and they can tell you which streets or areas are off-limits.
What happens if you ride without a required license
If you ride a motorized bicycle that is classified as a moped or motorcycle in your state and you do not have the proper license, you can be cited for operating an unregistered vehicle and driving without a license. The penalties vary by state but typically include a fine ranging from $100 to $500, and in some cases a court appearance. A second offense usually carries a higher fine and possible jail time.
Beyond legal penalties, riding an unlicensed motorized vehicle also means you are not insured. If you cause an accident or damage property, you could be personally liable for all costs, which can be thousands of dollars. Insurance companies will not cover damage or injuries if you were riding illegally.
How to find your state's specific rules
Your state's vehicle code is the official source for motorized bicycle rules. You can find it online by searching "[your state] motorized bicycle law" or "[your state] electric bicycle law." Most state legislatures post their vehicle codes on a public website, and the rules are usually in the section about bicycles or motor-driven cycles.
If the state code is hard to read, your state's motor vehicle department or highway patrol website often has a summary page written in plain language. Some states also publish a one-page fact sheet about what is and is not allowed. Your local police department can also tell you the state rule and any local rules that explore to your area.
Frequently Asked Questions
Can I ride a motorized bicycle on the sidewalk?
That depends on your state and city. Some places allow motorized bicycles on sidewalks if they are under a certain power limit, while others ban them entirely from sidewalks. Check your local city code or call your police department's non-emergency line to ask about sidewalk rules in your area.
Do I need a license for an electric bike with pedal information?
Most states do not require a license for pedal-information electric bikes that stay under the power limit (usually 750 watts) and have a top assisted speed of 20 to 28 miles per hour. Pedal information means the motor only works when you are pedaling, which is why these bikes are treated more like bicycles than motorcycles.
What if I modify my motorized bicycle to go faster?
If you modify the motor or remove the speed limiter so the bike exceeds your state's power or speed limit, it will be reclassified as a moped or motorcycle. You would then need a license and registration to ride it legally. Modified bikes are also more likely to be stopped by police.
Can I ride a motorized bicycle on a bike path?
Most bike paths ban motorized bicycles, even if they are legal on streets. Some paths allow pedal-information electric bikes but not throttle-controlled motorized bikes. Check the rules posted at the path entrance or contact your parks department to ask which types of motorized bikes are allowed.
Do I need insurance for a motorized bicycle?
If your motorized bicycle is classified as a bicycle under state law, insurance is not required. If it is classified as a moped or motorcycle, insurance is usually required by law. Even if it is not required, insurance is a good idea because it protects you if you cause an accident.