Built around Jawa-CZ's sport motorcycle platform, the 2007 Jawa-CZ 50 Robby utilizes a 49.5 cc (3 cu in) air-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 3.4 HP (2.4 kW) at 8,500 rpm while maximum torque reaches 3.2 Nm (2.4 lb-ft) at 5,500 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive. Internal engine geometry specifies a bore and stroke of 39.0 x 41.4 mm (1.5 x 1.6 inches) with a 8.5:1 compression ratio.
On the scales, the 50 Robby measures 80 kg (176 lbs) dry. Rider ergonomics and chassis geometry center around a 730 mm (28.7 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,200 mm (47.2 in) wheelbase engineered for quick, flickable steering geometry.
Within MotoLibrary's Jawa-CZ archive, this model family spans 8 indexed model years from 2006 to 2014, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Power Band Window
5,500–8,500 rpm
Standover Height
730 mm (28.7 in)
Engine
Displacement49.5 ccm (3.02 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power3.4 HP (2.4 kW)) @ 8500 RPM
Torque3.2 Nm (0.3 kgf-m or 2.4 ft.lbs) @ 5500 RPM
Compression8.5:1
Bore x Stroke39.0 x 41.4 mm (1.5 x 1.6 inches)
Fuel SystemCarburettor
CoolingAir
Transmission
Gearbox4-speed
Final DriveChain (final drive)
Performance
Top Speed48.0 km/h (29.8 mph)
Chassis
Front SuspensionTelescopic forks 80mm
Rear SuspensionHydraulic telescopic 70mm
Wheelbase1200 mm (47.2 inches)
Wheels & Brakes
Front Tyre-.
Front BrakesSingle disc
Front Brake Ø200 mm (7.9 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø124 mm (4.9 inches)
Dimensions & Weight
Dry Weight80.0 kg (176.4 pounds)
Power/Weight0.0419 HP/kg
Seat Height730 mm (28.7 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.
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.
