Derbi Dirt Boy - 2007 Specifications and Reviews

The 2007 Derbi Dirt Boy is a compact 50cc minibike designed for young riders and beginners seeking off-road thrills. Its lightweight frame and simple kick-start single-cylinder engine deliver accessible performance for dirt biking fundamentals. Known for affordable entry-level fun, it combines basic reliability with the rugged character needed for trail riding.

2007
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Engine and Transmission Specifications

Gearbox1-speed
Cooling systemAir
Lubrication systemOil pump
StarterKick
IgnitionCDI
Bore x stroke39.0 x 41.0 mm (1.5 x 1.6 inches)
Compression12.0:1
Power4.60
Stroke4
Engine typeSingle cylinder
Capacity:49.90 ccm (3.04 cubic inches)

Physical measures and capacities

Wheelbase905 mm (35.6 inches)
Overall width590 mm (23.2 inches)
Overall length1,290 mm (50.8 inches)

Derbi Dirt Boy dimensions and frame

Rear brakesExpanding brake (drum brake)
Front brakes diameter160 mm (6.3 inches)
Front brakesSingle disc
 
 

Speed and acceleration

Color optionsWhite
Fuel capacity2.30 litres (0.61 gallons)

CategoryMinibike, cross
Year2007
ModelDerbi Dirt Boy

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

4.6 hp
Peak Power

Best For

Track5%
City10%
Cornering30%
Daily Riding5%
Touring2%
Passenger0%

Rider Profile

Best ForThis is an entry-level minibike best suited to young or beginner riders taking their first steps on two wheels.
PurposeDesigned purely for casual backyard and off-road fun rather than any serious performance or commuting use.
Rider FitIts tiny frame, low seat height, and light weight demand very little physical strength or size from the rider, fitting smaller riders best.
CharacterA playful, low-stakes machine that rewards curiosity and casual messing about rather than any kind of speed thrill.
Not Ideal ForThis is not for adult riders seeking real off-road capability, highway use, or any kind of touring or passenger carrying.

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

Rider Reviews

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