Is Honda Grom Street Legal? YES! (But Not on All Highways)



Honda Grom - is it street legal

If you’ve been eyeing the Honda Grom, you’re probably wondering if this pocket-sized bike is street-legal. Well, let’s take a closer look at this popular small, affordable, and fuel-efficient motorcycle.

The Honda Grom: A Miniature Marvel

Picture this: a nifty little motorbike that’s perfect for zipping through city streets and exploring hidden corners. That’s the Honda Grom! 

This pint-sized two-wheeler has gained massive popularity due to its compact design, peppy performance, and friendly price tag. It’s the ultimate fun machine that’s sure to put a grin on your face!

The ABCs of Street Legality

Before we dive into the Honda Grom’s street legality, let’s understand what it means for a motorcycle to be street-legal. 

In a nutshell, it refers to a bike that meets all the specific requirements set by the government for safe and legal operation on public roads.

In the United States, each state has its own set of rules and regulations for street-legal motorcycles. 

The requirements generally cover essentials like headlights, taillights, turn signals, mirrors, horn, brake lights, and a muffler. 

Here’s the full list of basic requirements that need to be satisfied for any bike to hit the road in the USA. 

HeadlightDOT-approved, two modes: high beam and low beam
TaillightDOT-approved, visible from at least 500 feet to the rear
Brake lightDOT-approved, comes on when the brakes are applied
Turn signalsDOT-approved, visible from at least 300 feet to the front and rear
HornLoud enough to be heard from at least 200 feet away
MirrorsDOT-approved, provide a clear view of the rear
TiresDOT-approved, tread depth of at least 1/16 inch
License plateClearly visible from the rear
RegistrationRegistered with the state DMV
InsuranceInsured in accordance with state law

These features are crucial to ensure that you and your Grom stay visible and safe while riding on public roads.

Honda Grom Street Legal Requirements

Now, you might be wondering if the Honda Grom checks all the boxes to be street legal in the US. Fear not, because Honda designed the Grom with compliance in mind!

Headlight, Taillight, Turn Signals, Mirrors, Horn, Brake Lights, and Muffler: The Honda Grom comes equipped with all these essential components straight out of the factory. 

That means you won’t have to worry about adding extra bells and whistles to make it street legal.

However, depending on your state’s specific requirements, you might need to make some minor modifications. But don’t worry; these adjustments are usually simple and can be done easily.

State Restrictions for the Honda Grom on Highways 

Federal laws set the baseline for highway legality that is 50 CC. But, individual states can add their own unique twists to the mix. 

Let’s take a quick road trip through three states and see how the Honda Grom fares:

  • California: Lower limit is 150 CC. And it is known for its strict emissions standards. 
  • Illinois: Lower limit is 150 CC. The state may require a more thorough inspection of your motorcycle to ensure it meets all the necessary safety and emission requirements.
  • Michigan: Lower limit is 125 CC. The state might have some specific regulations on handlebar height and exhaust noise levels. Just double-check your Grom’s setup to avoid any hiccups.

Honda Grom – Top Speed

The Honda Grom may be small, but it packs quite a punch. On average, it can reach speeds of up to 60 miles per hour (97 km/h). But, with the 2023 Honda Grom, some riders have claimed they have hit 73 mph. 

That’s enough to get your adrenaline pumping without making you feel like you’re on a rocket ship!

Do you need a license to ride a Honda Grom?

Before you hit the road with your Grom, you need to have a valid motorcycle license. 

Just like any other motorcycle, you must be street-smart and road-ready to handle this feisty little ride. So, if you haven’t got your license yet, it’s time to gear up and hit the DMV!

Do I need to wear a helmet when riding a Honda Grom?

Safety first, riders! No matter how short the trip or how cool the breeze feels, a helmet is a non-negotiable accessory when you’re on your Grom. 

Protect that precious noggin, and you’ll have peace of mind while enjoying the thrill of the ride.

Is the Honda Grom a Good Option for Street Use?

Now comes the big question: is the Honda Grom the right choice for your daily commutes and city escapades? Let’s weigh the pros and cons.


  • Maneuverability: The Grom’s compact size makes it a breeze to navigate through traffic and squeeze into tight parking spaces.
  • Fuel Efficiency: With great fuel economy, the Grom won’t break the bank while you zip around town.
  • Fun Factor: It’s an absolute blast to ride! The Grom’s agility and responsive engine will have you grinning from ear to ear.


  • Limited Highway Power: While the Grom is perfect for city riding, it may feel underpowered on highways and steep inclines.
  • Size and Comfort: Taller riders might find the Grom a bit cramped, and the seat can get uncomfortable on long rides.

Ultimately, whether the Honda Grom is a good option for street use depends on your needs and preferences. 

If you’re looking for a fun and practical ride for short urban journeys, the Grom might be the perfect fit!

Modifications and Aftermarket Parts

Before you start customizing your Grom to make it truly your own, a word of caution! Some modifications, especially if they alter crucial safety features, may lead to your Grom losing its street-legal status. 

Here are some of the modifications that can affect the street legal requirements of your Honda Grom:

  • Exhaust system: If you install an aftermarket exhaust system to improve performance, you may need to have it modified to meet your state’s noise emissions regulations.
  • Air intake: If you install an aftermarket air intake to gain higher performance, you may need to have your motorcycle’s fuel mapping adjusted to compensate for the increased airflow.
  • Suspension: If you install aftermarket suspension components to improve handling, you may need to have your motorcycle’s headlight adjusted to ensure that it is still at the proper height.
  • Brakes: If you install aftermarket brakes, you may need to have your motorcycle’s brake lights adjusted to ensure that they are still visible.
  • Wheels and tires: If you install aftermarket wheels and tires to improve handling and performance, you may need to have your motorcycle’s speedometer recalibrated to ensure that it is still accurate.

It is important to check with your state’s DMV or motorcycle licensing agency to see if any of the modifications you are planning to make will affect the street legal requirements of your Honda Grom.

Stick to legal aftermarket parts, and you’ll have a customized Grom that’s both street-savvy and roadworthy!

Final Thoughts

The Honda Grom is indeed street-legal and ready to bring a whole lot of joy to your riding adventures. 

Just remember to stay informed about your state’s specific requirements, wear your helmet, and get that motorcycle license before you hit the road.

Now, it’s time to gear up, twist that throttle, and embark on unforgettable escapades with your trusty Honda Grom. Ride safe and ride happy!


Pradeep is a mechanical engineer by profession. His passion for modern tech in transportation goes hand in hand with his career. He loves all things about high tech transportation. When he’s not digging into latest auto news, you can find him either working on his tech startup or playing chess with his buddies.

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