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The Honda Grom has become a favorite among riders for its compact design, impressive fuel economy, and surprising performance for a 125cc motorcycle. Its small size and lightweight frame make it ideal for urban commuting, stunt riding, and weekend fun. But what truly sets the Grom apart is the depth of customization available through aftermarket parts.
Whether you’re building a better commuter, enhancing your track-day setup, or creating a unique custom machine, there are countless ways to upgrade your honda grom wheels. Here’s a breakdown of the most common categories of Grom parts and how they can enhance your riding experience.
1. Performance Parts
Exhaust Systems
Upgrading the exhaust is one of the most popular performance modifications. Aftermarket exhaust systems typically reduce weight and improve airflow, resulting in a crisper throttle response and a louder, more aggressive sound. While power gains are modest on their own, a better exhaust can lay the foundation for other engine modifications.
Air Intake and Fuel Tuning
Replacing the factory airbox with a high-flow intake system improves airflow into the engine. However, anytime you increase air intake or change the exhaust, you’ll need to adjust the fueling to maintain the proper air-fuel ratio. This can be done through tuning or a fuel controller to ensure smooth, reliable performance.
Big Bore Kits
For those looking to significantly increase power, big bore kits increase the engine’s displacement by installing a larger piston and cylinder. These kits boost torque and top-end speed, but they require proper tuning and supporting upgrades like stronger clutch components and improved cooling.
2. Suspension Upgrades
Front Suspension
The Grom’s stock front forks are designed for general use and may feel soft during aggressive riding. Suspension upgrades—such as stiffer springs or cartridge kits—improve front-end stability, cornering precision, and overall ride quality. Riders who frequently encounter rough roads or take sharp corners at speed will notice the difference immediately.
Rear Shock
An upgraded rear shock offers better damping control and allows for preload adjustments to suit different rider weights or riding styles. This is especially useful for stunting, track days, or two-up riding.
3. Brake Improvements
Though the stock braking system performs adequately for casual riding, brake upgrades can provide improved stopping power and control. Options include stronger brake pads, performance rotors, and braided brake lines, all of which contribute to more consistent braking, especially under load or during repeated hard stops.
4. Wheels and Tires
Tires greatly affect the Grom’s handling, traction, and ride comfort. Riders seeking better grip may choose softer compound tires, while those who ride primarily on the street may prefer tires with a balance of performance and longevity. Lightweight wheel options are also available to reduce unsprung weight, improve acceleration, and sharpen handling.
5. Controls and Ergonomics
Handlebars and Grips
Swapping out the handlebars can improve comfort and handling. Lower bars offer a sportier position, while taller bars provide a more upright, relaxed ride. New grips also improve rider comfort and help reduce fatigue on longer rides.
Levers and Foot Controls
Adjustable brake and clutch levers allow riders to fine-tune their reach for better control. Rearset footpegs can alter the riding position for a more aggressive or more relaxed feel, depending on the rider’s preference.
6. Bodywork and Styling
Lighting
LED lighting upgrades not only modernize the look of the Grom but also improve visibility. Headlight conversions, integrated tail lights, and low-profile turn signals are common modifications that improve both form and function.
Seat and Plastics
Custom seats enhance comfort and style, with options ranging from performance-oriented shapes to more padded touring-style designs. New plastics, body panels, and tail sections allow riders to fully personalize their Grom’s appearance.
Crash Protection
Frame sliders, axle sliders, and engine covers help protect the bike in the event of a fall. These are highly recommended for new riders or anyone pushing the limits of the bike in technical riding environments.
7. Maintenance and Reliability
Upgrading doesn’t always mean adding performance. Routine maintenance and replacing worn parts with higher-quality components are key to a reliable Grom. Essential maintenance parts include:
- Oil and filters
- Spark plugs
- Chains and sprockets
- Brake pads and rotors
- Battery replacements
Regular upkeep ensures your upgrades perform at their best and your Grom stays road-ready.
8. Gear Ratio and Sprockets
Changing the sprockets can alter the final drive ratio, allowing riders to fine-tune the bike’s acceleration and top speed. A lower gear ratio delivers quicker acceleration, while a higher ratio favors fuel economy and top-end performance. Sprocket changes are cost-effective and easy to reverse, making them a great option for experimentation.
Final Thoughts
The Honda Grom is more than a fun, efficient motorcycle — it’s a platform for experimentation, customization, and personal expression. Whether you’re looking for performance improvements, cosmetic enhancements, or comfort upgrades, the Grom’s modular design and strong aftermarket support make it easy to build a bike that fits your exact needs.
Before upgrading, define your priorities. Are you aiming for better handling, more power, or a completely different look? Focus your modifications around your riding goals, and build your Grom one smart step at a time.