Xmotos XB-21D - 2008 Specifications and Reviews

The 2008 Xmotos XB-21D is a lightweight 50cc minibike designed for young riders and beginners seeking an affordable entry point into motorcycle riding. Its compact dimensions, low seat height, and automatic transmission make it ideal for learning basic riding skills and off-road exploration. Known for its simplicity and reliability, this air-cooled single-cylinder machine prioritizes accessibility over performance.

2008
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Engine and Transmission Specifications

GearboxAutomatic
Cooling systemAir
StarterElectric & kick
Bore x stroke52.4 x 49.5 mm (2.1 x 1.9 inches)
Compression9.7:1
Power6.70
Stroke4
Engine typeSingle cylinder
Capacity:50.00 ccm (3.05 cubic inches)

Physical measures and capacities

Wheelbase1,100 mm (43.3 inches)
Ground clearance1,000 mm (39.4 inches)
Overall length1,500 mm (59.1 inches)
Seat height670 mm (26.4 inches) If adjustable, lowest setting.
Dry weight60.0 kg (132.3 pounds)
 
 

Xmotos XB-21D dimensions and frame

Rear brakesSingle disc
Front brakesSingle disc
Rear suspensionAdjustable Air bag shock absorption
Front suspensionUpside shock

Speed and acceleration

Power/weight ratio0.1117 HP/kg

CategoryMinibike, cross
Year2008
ModelXmotos XB-21D

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Color optionsBlack, Red, Green, Blue, Yellow, carbon block, orange
Fuel capacity3.00 litres (0.79 gallons)

Performance Profile & Rider Fit

6.7 hp
Peak Power (est.)

Best For

Track10%
City8%
Cornering30%
Daily Riding5%
Touring2%
Passenger2%

Rider Profile

Best ForThis is a beginner-level minibike best suited to children or novice riders learning throttle and brake control in a controlled, low-speed setting.
PurposeBuilt as a small recreational cross/minibike for backyard and casual off-road play rather than any serious performance or transport use.
Rider FitIts tiny 60 kg frame and low 670 mm seat height make it accessible to small or lightweight riders, including kids, but adults will feel cramped.
CharacterA fun, toy-like pit bike with basic automatic transmission, modest 6.7 hp output, and simple air-cooled single-cylinder power delivery aimed at easy, forgiving riding.
Not Ideal ForIt is not suitable for highway use, long-distance touring, carrying passengers, or any rider seeking real speed or performance.

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

Rider Reviews

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