2009 Derbi GP1 50 Racing Technical Analysis & Specification Breakdown
Engineered by Derbi for the scooter motorcycle segment, the 2009 Derbi GP1 50 Racing relies on a 49.4 cc (3 cu in) liquid-cooled single cylinder, two-stroke powerplant. Internal engine geometry specifies a bore and stroke of 40.0 x 39.3 mm (1.6 x 1.5 inches) with a 10.5:1 compression ratio.
On the scales, the GP1 50 Racing measures 103 kg (227 lbs) dry. Rider ergonomics and chassis geometry center around a 835 mm (32.9 in) seat height — resulting in a taller command-style riding posture suited to medium-to-tall inseams, combined with a 1,338 mm (52.7 in) wheelbase engineered for quick, flickable steering geometry. The 8-liter (2.1 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
835 mm (32.9 in)
Engine
Displacement49.4 ccm (3.01 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Compression10.5:1
Bore x Stroke40.0 x 39.3 mm (1.6 x 1.5 inches)
Fuel SystemCarburettor. 17.5 mm
IgnitionC.D.I
LubricationSeparate mixing with mechanical oil pump
CoolingLiquid
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchAutomated
Chassis
Front SuspensionUpside down fork
Rear SuspensionMonoshock
Wheelbase1338 mm (52.7 inches)
Wheels & Brakes
Front Tyre120/70-14
Rear Tyre140/60-14
Front BrakesSingle disc
Front Brake Ø245 mm (9.6 inches)
Rear BrakesSingle disc
Rear Brake Ø180 mm (7.1 inches)
Dimensions & Weight
Dry Weight103.0 kg (227.1 pounds)
Seat Height835 mm (32.9 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.
