Built around Honda's sport motorcycle platform, the 2017 Honda Grom utilizes a 124.9 cc (7.6 cu in) air-cooled single cylinder, four-stroke layout. 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 measures 103.9 kg (229 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 paired with a rated consumption of 1.76 L/100 km provides an estimated theoretical range of roughly 312 km (194 miles) between fill-ups.
Within MotoLibrary's Honda archive, this model family spans 12 indexed model years from 2014 to 2026, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Theoretical Range
~312 km (194 mi)
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
Fuel Consumption1.76 litres/100 km (56.8 km/l or 133.65 mpg)
Greenhouse Gases40.8 CO2 g/km. (CO2 - Carbon dioxide emission)
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.
