Specifications of the Honda Grom

Introduction to the Honda Grom

The Honda Grom, also known as the MSX125 in some countries, is a mini motorcycle that has gained immense popularity since its introduction in 2013. It is a fun and playful bike that offers great performance for riders of all levels.

One of the main reasons for its success is its compact size and light weight. With a seat height of just 30 inches and weighing only around 229 pounds, it’s easy to maneuver around tight corners and navigate through traffic. The Grom’s small size also makes it an excellent choice for beginners who are looking to learn how to ride on two wheels.

Despite its small stature, the Honda Grom packs quite a punch when it comes to performance. Its air-cooled, fuel-injected single-cylinder engine delivers impressive power while still maintaining excellent fuel efficiency. The five-speed gearbox ensures smooth shifting while riding.

Another feature that sets the Grom apart from other mini bikes is its stylish design. The bike features an aggressive stance with sharp lines and bold colors that make it stand out on the road.

In addition to being fun and exciting to ride, the Honda Grom is also practical for everyday use. It has ample storage space under the seat for carrying groceries or other small items while running errands.

Overall, whether you’re an experienced rider or just starting out, the Honda Grom offers an excellent balance of performance, style, and practicality that makes it one of today’s most popular mini motorcycles.

Engine Specifications of the Honda Grom

The Honda Grom is a mini-bike that packs a lot of power and performance into its compact frame. At the heart of this bike is an air-cooled, four-stroke engine that delivers reliable and efficient performance. Here are some key specifications for the engine:

  • Displacement: The Grom’s engine has a displacement of 124.9cc, which makes it one of the most powerful mini-bikes in its class.
  • Bore x Stroke: The bore and stroke measures at 52.4 mm x 57.9 mm respectively for optimal fuel efficiency.
  • Fuel delivery system: This bike comes with electronic fuel injection (EFI) to provide precise throttle response while maximizing fuel economy.
  • Cooling system: The air-cooled system efficiently maintains temperature stability across different weather conditions providing maximum safety on road trips
  • Horsepower & Torque: The power output generated by this motorbike reaches up to 9 horsepower @7000 rpm with peak torque measuring at approximately around7 lb-ft at low RPMs.

In combination, these features create an outstanding performance machine capable enough to keep you thrilled throughout your long or short distance rides while making sure you enjoy excellent fuel consumption rates as well as less carbon emissions impact on our environment.
Not only that but also ensures an incredible riding experience regardless if you’re gliding through tight city streets or taking quick turns off-road thanks to its responsive throttle control and comfortable handling designed specifically for riders’ convenience.”

Chassis and Suspension Specifications of the Honda Grom

The Honda Grom may be a small bike, but it packs a punch when it comes to its chassis and suspension specifications. Its compact design and lightweight frame make for nimble handling, while its upgraded suspension allows for a smoother ride on both pavement and off-road terrain.


The Grom features a high-tensile steel frame that is designed to provide stability and durability. The frame’s unique shape helps distribute weight evenly across the bike, making it easier to handle at high speeds or in tight turns. The low seat height also adds to the overall stability of the bike by lowering its center of gravity.


One of the most significant upgrades made to newer models of the Honda Grom is their improved suspension system. Up front, you’ll find an inverted fork with 31mm stanchions that offer increased stiffness and better damping than previous models. Inverted forks are typically found on more expensive bikes, so this feature is impressive considering how affordable the Grom is.

In addition to its inverted forks, the Grom also has a single shock absorber in the rear that provides ample cushioning for bumps in rough terrain or potholes on city streets. This rear shock is adjustable for preload as well as rebound damping so you can fine-tune your ride depending on your preferences.


The Honda Grom comes equipped with disc brakes both up front and in back which provide reliable stopping power even at higher speeds. The front brake uses a single-piston caliper while the rear brake employs a two-piston caliper which helps improve braking performance further still.

Tires & Wheels

A pair of 12-inch wheels wrapped in tires that measure 120/70-12 up front and 130/70-12 in the rear make for excellent traction on both pavement and dirt roads. The Grom’s compact size and low weight make it easy to maneuver through tight spaces or weave between traffic, making it an ideal bike for city riding.

Overall, the Honda Grom is a well-designed bike with impressive chassis and suspension specifications. Its lightweight frame, upgraded suspension system, disc brakes, and reliable tires all work together to provide a smooth ride no matter where your adventures take you.

Transmission and Clutch Specifications of the Honda Grom

The Honda Grom is a small motorcycle that packs a big punch. One of the key reasons for its impressive performance is its transmission and clutch system, which are designed to deliver smooth shifts and responsive acceleration.

The Grom features a four-speed manual transmission with an automatic clutch. This means that riders don’t have to worry about manually engaging or disengaging the clutch when shifting gears – instead, they simply shift up or down as needed while maintaining speed.

In addition to its automatic clutch system, the Grom also features a wet multiplate clutch design. This type of clutch uses multiple plates immersed in oil to provide smoother engagement and better heat dissipation than dry clutches.

Another notable feature of the Grom’s transmission is its gear ratios. The first three gears are relatively close together, providing quick acceleration at low speeds. The fourth gear has a taller ratio, which allows for more relaxed cruising at higher speeds without sacrificing fuel efficiency.

All in all, the Honda Grom’s transmission and clutch system are well-suited for both urban commuting and spirited riding on twisty back roads. Whether you’re looking for efficient transportation or just want to have some fun on two wheels, this little bike has plenty to offer.

Braking System Specifications of the Honda Grom

The Honda Grom is equipped with a high-quality braking system that ensures safety and reliable stopping power in various conditions. Here are the specifications of its braking system:

  • Front brake type: Hydraulic disc
  • Rear brake type: Hydraulic disc
  • Front brake size: 220 mm
  • Rear brake size:190 mm
  • The hydraulic disc brakes on both wheels provide excellent stopping power, even at high speeds or sudden stops. The front brake has a larger rotor size than the rear, which allows for better heat dissipation and improved performance.

    In addition to its standard braking system, the Honda Grom also features an Anti-Lock Braking System (ABS) as an optional upgrade. ABS helps prevent locking up of the wheels during emergency stops or slippery road conditions, which can lead to skidding or loss of control.

    Frequently Asked Questions (FAQs)

    Q: How many pistons do the Honda Grom’s brakes have?

    A: Both front and rear brakes have single-piston calipers.

    Q: Can I add ABS to my non-ABS-equipped Honda Grom?

    A: Yes, you can purchase and install an ABS kit from your authorized Honda dealer.

    Q: What is ABS?

    A: Anti-lock Braking System (ABS) is a safety feature that prevents wheel lock-up during hard braking by controlling hydraulic pressure applied on each wheel separately. This technology helps maintain tire traction and stability while reducing stopping distances.

Fuel System and Exhaust Specifications of the Honda Grom

The fuel system of the Honda Grom features a PGM-FI, or programmed fuel injection, which provides efficient fuel delivery to the engine. This system ensures that the air/fuel mixture is optimized, resulting in better performance and lower emissions.

The Grom’s exhaust system is designed with a single muffler that has a stainless steel header pipe. The muffler itself is made of aluminum, which helps reduce weight while maintaining durability. Additionally, the exhaust has been tuned for performance and sound quality.

In terms of fuel capacity, the Grom can hold up to 1.45 gallons (5.5 liters) of gasoline. This allows for an estimated range of over 100 miles per tank depending on riding conditions.

Overall, the combination of the efficient fuel system and high-performance exhaust make for an enjoyable riding experience on this small but mighty motorcycle.

Electrical System Specifications of the Honda Grom

The electrical system of the Honda Grom is designed to provide reliable performance and efficient power delivery for a variety of applications. Here are some key specifications that you should be aware of:


The Honda Grom comes equipped with a maintenance-free, sealed lead-acid battery with a capacity of 12V-3Ah. This battery provides ample power for starting the engine and running all electrical components.

Charging System

The charging system on the Honda Grom consists of an alternator that generates AC power which is then rectified by a regulator/rectifier unit to produce DC voltage that charges the battery. The charging output is rated at 360W at 5000 rpm.


The lighting system on the Honda Grom includes a bright halogen headlight, LED tail light, and turn signals mounted on either side of the handlebars. These lights provide excellent visibility in low-light conditions while also enhancing visibility to other drivers.

Instruments and Controls

The instrument cluster on the Honda Grom is simple but comprehensive, consisting of an analog speedometer with digital odometer/tripmeter display. There are also indicator lights for high beam, neutral gear position, turn signals, and low fuel levels.

Other controls include push-button starter switch located below the right handlebar grip; left-hand clutch lever; right-hand front brake lever; three-position ignition switch (off/on/start); kill switch located next to start button; throttle twist-grip; rear brake pedal.


Overall, these electrical system specifications make it clear that this small bike can pack quite a punch! Whether you’re looking for reliability or efficiency in your motorcycle’s electrical setup – there’s no doubt about it: The Honda Grom delivers on both fronts.

Conclusion and Final Thoughts on the Honda Grom

In conclusion, the Honda Grom is a small but powerful motorcycle that has won over the hearts of many riders. With its lightweight frame and responsive engine, it provides a thrilling riding experience that is perfect for commuting or weekend fun.

One of the standout features of the Honda Grom is its fuel efficiency. It boasts an impressive 134 MPG rating, making it one of the most fuel-efficient motorcycles on the market today. This not only saves riders money at the pump but also helps to reduce their carbon footprint.

Additionally, the Honda Grom’s compact size makes it easy to maneuver in tight spaces and navigate through traffic. Whether you’re zipping down city streets or taking on winding back roads, this motorcycle handles like a dream.

Another great aspect of the Honda Grom is its affordability. Starting at just under $3,500 MSRP, it’s an excellent value for those looking for a high-quality motorcycle without breaking the bank.

Overall, we highly recommend the Honda Grom to anyone who wants a fun and reliable bike that can handle anything from daily commutes to weekend adventures. Its unbeatable combination of performance, efficiency, and affordability make it truly stand out in its class.