MBK Nitro Naked - 2009 Specifications and Reviews

The 2009 MBK Nitro Naked is a lightweight 50cc scooter designed for urban commuters and new riders seeking affordable, practical transportation. Powered by a liquid-cooled single-cylinder engine with automatic transmission, it excels in city environments where maneuverability and fuel efficiency matter most. Known for its reliability and low maintenance costs, this scooter represents accessible entry-level motorized transport.

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Engine and Transmission Specifications

ClutchCentrifugal Automatic
Transmission typefinal driveBelt
GearboxAutomatic
Cooling systemLiquid
Lubrication systemSeparate lubrication
StarterElectric & kick
IgnitionCDI
Bore x stroke40.0 x 39.2 mm (1.6 x 1.5 inches)
Compression7.4:1
Torque3.70
Power2.68
Stroke2
Engine typeSingle cylinder
Capacity:49.20 ccm (3.00 cubic inches)
 
 

Physical measures and capacities

Overall width720 mm (28.3 inches)
Overall length1,743 mm (68.6 inches)
Overall height1,145 mm (45.1 inches)
Seat height828 mm (32.6 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc82.0 kg (180.8 pounds)
Dry weight92.0 kg (202.8 pounds)

MBK Nitro Naked dimensions and frame

Rear brakes diameter190 mm (7.5 inches)
Rear brakesSingle disc
Front brakes diameter190 mm (7.5 inches)
Front brakesSingle disc
Rear tyre dimensions140/60-13
Front tyre dimensions130/60-13
Rear suspensionUnit swing
Front suspensionTelescopic fork

Speed and acceleration

Power/weight ratio0.0291 HP/kg

CategoryScooter
Year2009
ModelMBK Nitro Naked

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Color optionsJet black
Oil capacity1.30 litres (0.09 quarts)
Fuel capacity7.00 litres (1.85 gallons)

Performance Profile & Rider Fit

2.7 hp
Peak Power

Best For

Track5%
City88%
Cornering35%
Daily Riding75%
Touring15%
Passenger25%

Rider Profile

Best ForThis 50cc scooter is ideal for beginners, learners, or anyone needing a simple, low-risk way to get around, including those without a full motorcycle license.
PurposeBuilt purely for short-distance urban commuting and running errands rather than performance or long journeys.
Rider FitVery light and low-powered, making it easy to handle for riders of almost any size, strength, or confidence level.
CharacterA practical, no-frills city runabout with automatic transmission that prioritizes ease of use over excitement.
Not Ideal ForNot suitable for highway travel, touring, carrying a passenger comfortably, or anyone seeking speed or off-road capability.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2009 MBK Nitro Naked Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 828mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with balls of both feet on the 2009 MBK Nitro Naked, with a moderate knee angle of around 105 degrees and a slightly forward riding position.

Data quality: estimated (wheelbase estimated from this category's typical bike, not this model's own spec). Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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