Derbi Dirt Boy: history, specs, pictures
| Manufacturer | Derbi |
|---|---|
| Also called | Dirt Boy10, Dirt Boy 10, Dirt Boy50, Dirt Boy 50 |
| Production | 2006 - 2009 |
| Engine | single cylinder, four-stroke |
| Bore / Stroke | 39.0mm x 41.8mm |
| Horse Power | 4.56 HP (3.4 KW) @ 8500RPM |
| Fuel system | carburetor. 14 mm |
| Ignition type | cdi |
| Battery | 12.0:1 |
| Transmission | Gear box: 1-speed Final Drive: belt |
| Suspension | Front: hydraulic fork. Rear: monoshock. |
| Brakes | Front: single disc Rear: expanding brake (drum brake) |
| Front Tire | 2.50-12 |
| Rear Tire | 2.75-10 |
| Wheelbase | 35.63 inches (905 mm) |
| Dimensions | L 50.79 inches (1290 mm) W 20.43 inches (519 mm) H 49.61 inches (1260 mm) |
| Seat height | 24.02 inches (610 mm) |
| Weight | 103.62 pounds (47.0 Kg) |
| Fuel capacity | 0.61 Gallon (2.30 Liters) |
| Manuals | Service Manual |
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The Derbi Dirt Boy50 was a single cylinder, four-stroke standard produced by Derbi between 2006 and 2009. Claimed horsepower was 4.56 HP (3.4 KW) @ 8500 RPM.
Engine
The engine was a air cooled single cylinder, four-stroke. A 39.0mm bore x 41.8mm stroke result in a displacement of just 49.9 cubic centimeters.
Drive
The bike has a 1-speed transmission.
Chassis
It came with a 2.50-12 front tire and a 2.75-10 rear tire. Stopping was achieved via single disc in the front and a expanding brake (drum brake) in the rear. The front suspension was a hydraulic fork. while the rear was equipped with a monoshock.. The Dirt Boy50 was fitted with a 0.61 Gallon (2.30 Liters) fuel tank. The bike weighed just 103.62 pounds (47.0 Kg). The wheelbase was 35.63 inches (905 mm) long.