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Honda Grom Parts Guide: Upgrade Your Ride Without the Hype
The Honda Grom has earned its reputation as one of the most fun and versatile small motorcycles on the road. With a compact size, light weight, and simple design, it’s not only beginner-friendly but also incredibly modifiable. Riders around the world have embraced the Grom as a blank canvas, customizing it for commuting, sport riding, stunting, and everything in between.
In this guide, we’ll walk through the key categories of Honda Grom parts, helping you better understand which upgrades deliver real value — and how to make smart choices without getting lost in brand hype.
Engine & Performance Parts
Exhaust Systems
One of the most common upgrades is the exhaust system. The stock exhaust is functional but restrictive. Replacing it with a lighter, freer-flowing system can improve airflow, reduce weight, and enhance the sound of the bike.
Upgraded exhaust systems can also support modest performance gains when combined with other engine mods.
Air Intake and Fuel Management
A more efficient intake system increases airflow into the engine, improving throttle response. However, changes to the intake or exhaust should be accompanied by adjustments to the bike’s fuel delivery system. This is typically done using a fuel controller or ECU tuning solution to maintain the correct air-fuel ratio.
Skipping this step can result in poor engine performance or long-term reliability issues.
Big Bore Kits
For those looking to move beyond the limitations of the 125cc engine, big bore kits are available to increase displacement. These kits often include a larger cylinder and piston, and may require additional upgrades such as a reinforced clutch or fuel injector.
Proper tuning is essential when installing a big bore kit to ensure reliable performance and engine longevity.
Suspension & Handling
Fork and Shock Upgrades
The Grom’s stock suspension is adequate for casual riding but can feel soft or underdamped during aggressive cornering, off-road use, or stunting. Replacing the front forks or rear shock with upgraded components allows for better ride quality, more precise control, and greater comfort.
Adjustable options let you dial in preload, rebound, and compression based on rider weight and riding style.
Tires
Upgrading your tires is one of the most cost-effective ways to improve handling. Higher-performance tires offer better grip, improved feedback, and greater confidence in both wet and dry conditions. Choosing a tire with a softer compound or a more performance-oriented tread pattern can make a noticeable difference.
Braking System
Improving your brakes enhances both performance and safety. While the stock setup is sufficient for basic use, more responsive braking is often desired for fast-paced or technical riding.
Recommended upgrades include:
- Steel-braided brake lines for better feel and reduced fade
- High-performance brake pads
- Upgraded rotors for better heat dissipation
Brake upgrades often work best when done together, rather than one component at a time.
Controls & Ergonomics
Handlebars and Grips
Riders frequently replace the stock handlebars for better ergonomics or style. Some prefer a flatter, wider handlebar for better leverage and control. Upgraded grips can also improve comfort and reduce vibration on longer rides.
Levers and Mirrors
Adjustable levers allow for improved hand fitment, which is especially useful for riders with smaller or larger hands. Mirror replacements are often done for aesthetics, better field of vision, or a more compact look.
Body and Aesthetic Mods
Lighting
Lighting upgrades are both functional and cosmetic. Swapping out factory lights for LED options can improve visibility while giving the bike a modern, sharp appearance. Many riders also opt for integrated lighting solutions that clean up the overall look of the bike.
Seats and Body Panels
Aftermarket seats can provide more padding or a more aggressive seating position. Custom body panels, fairings, and tail tidies help streamline the bike’s appearance, reduce visual bulk, or emphasize a particular aesthetic — whether minimalist, sporty, or retro.
Crash Protection
Frame sliders, axle sliders, and engine guards protect the bike from damage in the event of a tip-over or low-speed fall. These are essential for riders who stunt or ride in urban environments where drops are more likely.
Maintenance Essentials
Even without major upgrades, keeping up with basic maintenance using quality parts is key to keeping your Grom running smoothly.
Routine replacements include:
- Spark plugs
- Oil filters
- Brake pads
- Chains and sprockets
- Batteries
Proactive maintenance also gives you a chance to inspect and improve small areas of the bike incrementally, even if you’re not building a full custom project.
Gearing Changes
Changing the sprockets can alter how the Grom delivers power. A smaller front sprocket or larger rear sprocket will give better acceleration, while the opposite setup can increase top speed. These changes are relatively inexpensive and reversible, allowing you to experiment based on your riding needs.
Final Thoughts
The Honda Grom is more than just a fun entry-level motorcycle — it’s a platform that encourages creativity and mechanical curiosity. With the wide range of parts available, you can transform your Grom into a sportier, more aggressive machine, a comfortable commuter, or a completely unique show bike.
Before upgrading, take time to define your riding goals. Are you chasing more power, sharper handling, better style, or improved comfort? Choosing parts that match your riding style will result in a more enjoyable and functional build.
The beauty of the Grom is that it grows with you. Whether you’re just starting to ride or looking for your next project, there’s always something new to explore with the right parts and a little imagination.