2009 Derbi GP1 125 Racing Technical Analysis & Specification Breakdown
Built around Derbi's scooter motorcycle platform, the 2009 Derbi GP1 125 Racing utilizes a 124.8 cc (7.6 cu in) liquid-cooled single cylinder, two-stroke layout. Internal engine geometry specifies a bore and stroke of 56.0 x 50.7 mm (2.2 x 2.0 inches) with a 12.5:1 compression ratio.
On the scales, the GP1 125 Racing measures 138 kg (304 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 1,374 mm (54.1 in) wheelbase engineered for quick, flickable steering geometry. The 11-liter (2.9 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 2008 to 2009, 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, two-stroke
Engine DetailsSingle cylinder, two-stroke
Compression12.5:1
Bore x Stroke56.0 x 50.7 mm (2.2 x 2.0 inches)
Fuel SystemCarburettor
IgnitionElectronic CDI
LubricationOil pump
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchAutomatic
Chassis
Front Suspension40 mm upside-down fork.
Front Travel90 mm (3.5 inches)
Rear SuspensionDouble-shock
Rear Travel75 mm (3.0 inches)
Wheelbase1374 mm (54.1 inches)
Wheels & Brakes
Front Tyre120/70-14
Rear Tyre140/60-13
Front BrakesSingle disc
Front Brake Ø245 mm (9.6 inches)
Rear BrakesSingle disc
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Dry Weight138.0 kg (304.2 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.
