Built around Derbi's sport motorcycle platform, the 2009 Derbi GPR 125 4T 4V features a 124.8 cc (7.6 cu in) liquid-cooled single cylinder, four-stroke configuration. Internal engine geometry specifies a bore and stroke of 58.0 x 47.0 mm (2.3 x 1.9 inches) with a 12.0:1 compression ratio.
On the scales, the GPR 125 4T 4V measures 120 kg (265 lbs) dry. 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, combined with a 1,355 mm (53.3 in) wheelbase engineered for quick, flickable steering geometry. The 14-liter (3.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Derbi archive, this model family spans 2 indexed model years from 2009 to 2010, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
800 mm (31.5 in)
Engine
Displacement124.8 ccm (7.61 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Compression12.0:1
Bore x Stroke58.0 x 47.0 mm (2.3 x 1.9 inches)
Valves/Cylinder4
Fuel SystemCarburettor. 30 mm
IgnitionCDI
LubricationOil pump
CoolingLiquid
Transmission
Gearbox6-speed
Final DriveChain (final drive)
ClutchMulti-disc
Performance
ExhaustEuro III
Chassis
Front Suspension40 mm upside-down fork.
Front Travel120 mm (4.7 inches)
Rear SuspensionMonoshock.
Rear Travel120 mm (4.7 inches)
Wheelbase1355 mm (53.3 inches)
Wheels & Brakes
Front Tyre110/70-17
Rear Tyre130/70-17
Front BrakesSingle disc. Radial Caliper
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc. Floating Caliper
Rear Brake Ø180 mm (7.1 inches)
Dimensions & Weight
Dry Weight120.0 kg (264.6 pounds)
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.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
