2018 Cobra CX50 JR Technical Analysis & Specification Breakdown
At the heart of the 2018 Cobra CX50 JR minibike, cross motorcycle, Cobra pairs a 50 cc (3.1 cu in) liquid-cooled single cylinder, two-stroke architecture with road-focused gearing. Internal engine geometry specifies a bore and stroke of 39.0 x 41.7 mm (1.5 x 1.6 inches).
On the scales, the CX50 JR measures 36 kg (79 lbs) dry. Rider ergonomics and chassis geometry center around a 607 mm (23.9 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 908 mm (35.7 in) wheelbase engineered for quick, flickable steering geometry. The 2.6-liter (0.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Cobra archive, this model family spans 6 indexed model years from 2009 to 2023, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
607 mm (23.9 in)
Engine
Displacement50.0 ccm (3.05 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsV-Force Reed Valve
Bore x Stroke39.0 x 41.7 mm (1.5 x 1.6 inches)
Fuel SystemCarburettor. 14 mm
Fuel ControlSingle Overhead Cams (SOHC)
LubricationMixture lubrication
CoolingLiquid
Transmission
Gearbox1-speed
Final DriveChain (final drive)
ClutchCobra 3Gx 3-Shoe
Performance
ExhaustTuned pipe and silencer
Chassis
Frame TypeDouble Cradle 4130 CrMo steel
Front SuspensionCARD 30mm USD
Front Travel170 mm (6.7 inches)
Rear SuspensionCARD Adjustable Piggyback
Rear Travel170 mm (6.7 inches)
Wheelbase908 mm (35.7 inches)
Ground Clearance216 mm (8.5 inches)
Wheels & Brakes
Front Tyre60/100-10
Rear Tyre70/100-10
Front BrakesSingle disc
Front Brake Ø160 mm (6.3 inches)
Rear BrakesSingle disc
Rear Brake Ø140 mm (5.5 inches)
WheelsCobra 10 inch Billet
Dimensions & Weight
Dry Weight36.0 kg (79.4 pounds)
Seat Height607 mm (23.9 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.
