Engineered by Honda for the sport motorcycle segment, the 2015 Honda Grom 125 relies on a 124.9 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. Internal engine geometry specifies a bore and stroke of 52.4 x 57.9 mm (2.1 x 2.3 inches) with a 9.3:1 compression ratio.
On the scales, the Grom 125 measures 102.1 kg (225 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 754 mm (29.7 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,199 mm (47.2 in) wheelbase engineered for quick, flickable steering geometry. The 5.49-liter (1.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Standover Height
754 mm (29.7 in)
Engine
Displacement124.9 ccm (7.62 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Compression9.3:1
Bore x Stroke52.4 x 57.9 mm (2.1 x 2.3 inches)
Valves/Cylinder2
Fuel SystemInjection. PGM-FI with automatic enrichment
Fuel ControlSingle Overhead Cams (SOHC)
IgnitionElectronic
CoolingAir
Transmission
Gearbox4-speed
Final DriveChain (final drive)
Performance
Emission DetailsMeets current EPA standards. Models sold in California meet current CARB standards and may differ slightly due to emissions equipment.
Chassis
Rake25.0°
Trail81 mm (3.2 inches)
Front Suspension31mm inverted fork
Front Travel118 mm (4.6 inches)
Rear SuspensionSingle shock with steel box-section swingarm
Rear Travel70 mm (2.8 inches)
Wheelbase1199 mm (47.2 inches)
Wheels & Brakes
Front Tyre120/70-12
Rear Tyre130/70-12
Front BrakesSingle disc. Hydraulic. Two-piston calipers.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
