The Honda Grom is a small motorcycle with a big following. Riders are drawn to its lightweight design, excellent fuel efficiency, and low cost of ownership. But what truly sets the Grom apart is its incredible potential for customization. Whether you’re a beginner or an experienced rider, the Grom offers a solid foundation for upgrades and personal touches.
This guide walks through the essential categories of Honda Grom parts, helping you understand where to start and how to choose upgrades based on your riding goals.
Engine Performance Upgrades
Exhaust System
Replacing the stock exhaust is one of the most common modifications. A performance exhaust can reduce weight, increase airflow, and produce a deeper, more noticeable engine tone. While the power gains are modest, the overall responsiveness and riding feel can improve significantly.
Air Intake System
Improved intake systems allow more air into the engine, which can support smoother throttle response and slightly better power delivery. Intake upgrades are most effective when combined with exhaust modifications and proper tuning.
Fuel and ECU Tuning
Any time airflow is changed — whether through the intake, exhaust, or both — the engine requires recalibration. This is done by tuning the fuel injection system or updating the engine control unit. Tuning helps maintain correct air-fuel ratios, improve efficiency, and protect engine health.
Big Bore Kits
For riders seeking more substantial performance gains, big bore kits are available to increase the engine’s displacement. These kits replace the piston and cylinder to add power and torque. However, additional modifications — such as fuel system upgrades and tuning — are typically required to ensure reliability.
Suspension and Handling
Front Suspension
The Grom’s factory front forks are basic and tuned for general riding. Upgrading the springs or internal damping components can lead to more precise handling, reduced dive under braking, and improved ride comfort over uneven roads.
Rear Shock
The stock rear shock may feel underpowered, especially for heavier riders or aggressive cornering. An upgraded shock with adjustable damping and preload can improve control and provide a more consistent feel across different conditions.
Braking System
Better braking equals better confidence. Upgrades to the braking system can include:
- Stronger brake pads for improved friction
- Steel-braided lines for more consistent lever feel
- Larger or vented brake rotors for better heat dissipation
These improvements enhance stopping power and reduce fade during heavy or repeated braking.
Tires and Wheels
Tires are one of the most important factors in ride quality and safety. Choosing the right tire compound and tread pattern can enhance grip, stability, and cornering performance. Riders can also upgrade wheels for weight reduction, durability, or visual appeal.
Controls and Ergonomics
Handlebars and Grips
Aftermarket handlebars can change the riding position to be more upright or more aggressive, depending on preference. New grips reduce vibration and improve comfort for longer rides.
Levers and Pegs
Adjustable brake and clutch levers allow riders to customize reach and feel. Upgraded footpegs or rearsets can improve ergonomics and foot control, especially for sport or stunt riding.
Lighting and Electrical
Upgrading the lighting system improves both safety and style. Common upgrades include:
- LED headlights for better visibility
- Integrated tail lights with built-in turn signals
- Smaller, low-profile signal lights for a cleaner look
Lighting upgrades are relatively easy to install and can drastically improve nighttime visibility and the bike’s overall appearance.
Bodywork and Styling
The Grom is a favorite for visual customization. Riders frequently replace or modify:
- Seat designs for better comfort or lower profile
- Fenders and panels for a more aggressive or minimalist appearance
- License plate mounts to clean up the rear end
These parts allow riders to express their personal style while also improving aerodynamics or reducing weight.
Crash Protection and Safety
Because the Grom is lightweight and often used in urban environments or for stunts, crash protection is a smart investment. Options include:
- Frame sliders to protect the chassis
- Axle sliders to prevent damage to wheels and forks
- Engine covers for impact protection
These parts can prevent costly repairs in the event of a tip-over or slide.
Maintenance Essentials
Upgrading parts doesn’t just mean adding performance — it also includes replacing worn-out components with better alternatives. Keeping up with basic maintenance ensures the Grom runs reliably.
Key maintenance parts include:
- Oil and filters
- Spark plugs
- Brake pads
- Chains and sprockets
- Batteries
Even stock replacement parts can be upgraded for longer life, better performance, or easier servicing.
Final Thoughts
The Honda Grom is more than a small motorcycle — it’s a platform for creativity, performance, and fun. The wide availability of parts makes it easy to tailor the bike to your exact preferences, whether you’re aiming for better speed, sharper handling, improved comfort, or a completely custom look.
Before upgrading, define your goals clearly. Do you want more performance? A smoother ride? A cleaner design? Start with your priorities and build the bike that fits your riding style.
With the right parts and some careful planning, the Grom can evolve from a reliable stock machine into something uniquely yours — without needing big horsepower or a big budget.