Honda Grom - 2018 Specifications and Reviews

The 2018 Honda Grom is a lightweight, easy-to-ride mini motorcycle perfect for beginners, urban commuters, and riders seeking affordable fun. Known for its nimble handling, low 754mm seat height, and playful character, it excels in tight spaces and delivers entertaining performance in a compact 103.9kg package. Its electric starter, five-year transferable warranty, and manageable 125cc engine make it an accessible entry point to motorcycle ownership.

4 stars Average rating: 4 from 2 votes
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General information

CategorySport
Year2018
ModelHonda Grom

Engine and Transmission Specifications

Greenhouse gases40.8 CO2 g/km. (CO2 - Carbon dioxide emission)
Fuel consumption1.76 litres/100 km (56.8 km/l or 133.65 mpg)
Transmission type,final driveChain
Gearbox4-speed
Cooling systemAir
IgnitionElectronic
Fuel controlSingle Overhead Cams (SOHC)
Fuel systemInjection. PGM-FI with automatic enrichment
Valves per cylinder2
Bore x Stroke52.4 x 57.9 mm (2.1 x 2.3 inches)
Compression9.3:1
Engine typeSingle cylinder, four-stroke

Brakes, suspension, Frame and wheels

Rear brakes diameter190 mm (7.5 inches)
Rear brakesSingle disc. Hydraulic. Single-piston caliper.
Front brakes diameter220 mm (8.7 inches)
Front brakesSingle disc. Hydraulic. Two-piston calipers.
Rear tyre130/70-12
Front tyre120/70-12
Rear wheel travel70 mm (2.8 inches)
Rear SuspensionSingle shock with steel box-section swingarm
Front wheel travel118 mm (4.6 inches)
Front Suspension31mm inverted fork
Trail81 mm (3.2 inches)
Rake (fork angle)25.0°
 
 

Physical measures and capacities

Fuel capacity5.49 litres (1.45 gallons)
Wheelbase1,199 mm (47.2 inches)
Seat height754 mm (29.7 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc103.9 kg (229.0 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
CommentsModel ID: Grom125
Factory warrantyOne year. Unlimited milage. Transferable.
StarterElectric
Color optionsMatte Gray Metallic, Pearl Red, Pearl White, Bright Yellow

Performance Profile & Rider Fit

Best For

Track55%
City95%
Cornering80%
Daily Riding75%
Touring20%
Passenger25%

Rider Profile

Best ForIdeal for beginners and even experienced riders looking for a fun, low-stakes machine to hone throttle and clutch control.
PurposeBuilt for playful urban commuting, tight backroad scratching, and general grin-inducing fun rather than outright performance.
Rider FitIts very low seat height and lightweight 224 lb chassis make it extremely accessible to shorter or less physically strong riders.
CharacterA cheeky, minibike-inspired runabout that rewards flickable handling and high-rev thrashing over raw power.
Not Ideal ForNot suited to highway touring, carrying a passenger long distances, or riders seeking strong straight-line performance.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2018 Honda Grom Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 754mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2018 Honda Grom, with a cramped knee angle of around 65 degrees and a forward-leaning riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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Rider Reviews

Total comments: 1
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MotorcycleDB Review

The 2018 Honda Grom is a fun and agile motorcycle that is perfect for urban riding. Its compact size and lightweight design make it easy to maneuver through city streets, while its 125cc engine provides plenty of power for zipping around town. The Grom also features a comfortable riding position, making it a great choice for commuters and weekend riders alike. Overall, the 2018 Honda Grom is a great option for anyone looking for a reliable and enjoyable urban motorcycle. With its stylish design and impressive performance, the 2018 Honda Grom is a stand-out in the world of small displacement motorcycles. The Grom's fuel-injected engine delivers excellent fuel efficiency and smooth power delivery, while its nimble handling makes it a blast to ride. Whether you're cruising around town or taking on twisty back roads, the 2018 Honda Grom offers a fun and exciting riding experience. Plus, with its affordable price point, the Grom is a great value for anyone in the market for a versatile and economical motorcycle.
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