Xmotos XB-21 - 2008 Specifications and Reviews

The 2008 Xmotos XB-21 is a lightweight 50cc minibike designed for young riders and beginners seeking an affordable entry into motorcycling. Its compact frame, automatic transmission, and low seat height make it ideal for learning basic riding skills. Known for its simple air-cooled engine and minimal maintenance requirements, this cross-styled bike offers practical fun for casual off-road use.

2008
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Engine and Transmission Specifications

Transmission typefinal driveChain
GearboxAutomatic
Cooling systemAir
Bore x stroke39.0 x 41.4 mm (1.5 x 1.6 inches)
Compression9.4:1
Power3.48
Stroke4
Engine typeSingle cylinder
Capacity:50.00 ccm (3.05 cubic inches)
 
 

Physical measures and capacities

Wheelbase950 mm (37.4 inches)
Ground clearance150 mm (5.9 inches)
Overall length1,320 mm (52.0 inches)
Seat height650 mm (25.6 inches) If adjustable, lowest setting.
Dry weight50.0 kg (110.2 pounds)

Xmotos XB-21 dimensions and frame

Rear brakesExpanding brake (drum brake)
Front brakesExpanding brake (drum brake)
Rear suspensionAdjustable Air /Oil shock Absorber
Front suspensionInverted hydraulic Adjustable shock

Speed and acceleration

Power/weight ratio0.0696 HP/kg
 
 

CategoryMinibike, cross
Year2008
ModelXmotos XB-21

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

3.5 hp
Peak Power

Best For

Track5%
City10%
Cornering20%
Daily Riding5%
Touring2%
Passenger0%

Rider Profile

Best ForThis is an entry-level minibike suited to young or novice riders taking their first steps on two wheels, not for licensed road use.
PurposeDesigned for casual backyard and light off-road cross riding rather than any serious performance or commuting task.
Rider FitIts tiny 50mm seat height and 50kg weight make it accessible to small or lightweight riders, particularly kids or petite teens.
CharacterA simple, low-power automatic pit-bike style machine that prioritizes fun and forgiveness over speed or capability.
Not Ideal ForThis is not suitable for adult riders seeking real off-road performance, highway travel, or carrying a passenger.

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

Rider Reviews

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