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MotoLibrary Score
34/100Commuter
Power/Weight
0.1 hp/kg
Torque
12 Nm
Engine
124 ccm
Technical Overview
2009 Vespa GT Navy 125 Technical Analysis & Specification Breakdown
Built around Vespa's scooter motorcycle platform, the 2009 Vespa GT Navy 125 utilizes a 124 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 14 HP (10.2 kW) while maximum torque reaches 12 Nm (8.9 lb-ft), transferring power to the rear wheel through belt final drive. With a specific output of 112.9 HP per liter, the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the GT Navy 125 measures 144 kg (317 lbs) dry, translating to a power-to-weight ratio of 0.1 HP/kg (10.29 kg per horsepower). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance. The 9.5-liter (2.5 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
112.9 HP/L
Power-to-Weight
0.1 HP/kg (10.29 kg/HP)
Standover Height
800 mm (31.5 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power14.0 HP (10.2 kW))
Torque12.0 Nm (1.2 kgf-m or 8.9 ft.lbs)
Valves/Cylinder4
Fuel SystemCarburettor
CoolingLiquid
Transmission
Final DriveBelt (final drive)
Chassis
Front SuspensionSingle leg with coil spring and double acting hydraulic shock absorber coaxial spring
Rear SuspensionTwo double acting shock absorbers with adjustable spring preload
Wheels & Brakes
Front Tyre120/70-12
Rear Tyre130/70-12
Front BrakesSingle disc
Front Brake Ø220 mm (8.7 inches)
Rear BrakesSingle disc
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Dry Weight144.0 kg (317.5 pounds)
Power/Weight0.0972 HP/kg
Seat Height800 mm (31.5 inches) If adjustable, lowest setting.
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.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
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.
