Built around Derbi's scooter motorcycle platform, the 2010 Derbi Atlantis 50 4T pairs a 49.9 cc (3 cu in) air-cooled single cylinder, four-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 39.0 x 41.8 mm (1.5 x 1.6 inches) with a 11.5:1 compression ratio.
On the scales, the Atlantis 50 4T measures 102 kg (225 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 795 mm (31.3 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,265 mm (49.8 in) wheelbase engineered for quick, flickable steering geometry. The 7.1-liter (1.9 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 2010 to 2012, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
795 mm (31.3 in)
Engine
Displacement49.9 ccm (3.04 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Compression11.5:1
Bore x Stroke39.0 x 41.8 mm (1.5 x 1.6 inches)
Fuel SystemCarburettor. 18 mm
LubricationSystem oil pump
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchAutomatic
Chassis
Front Suspension25 mm hydraulic fork.
Front Travel65 mm (2.6 inches)
Rear SuspensionMonoshock.
Rear Travel65 mm (2.6 inches)
Wheelbase1265 mm (49.8 inches)
Wheels & Brakes
Front Tyre120/70-12
Rear Tyre120/70-12
Front BrakesSingle disc
Front Brake Ø200 mm (7.9 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø110 mm (4.3 inches)
Dimensions & Weight
Dry Weight93.0 kg (205.0 pounds)
Weight incl.102.0 kg (224.9 pounds)
Seat Height795 mm (31.3 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.
