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Overview: Derbi GPR 125 4T 4V Motorcycle |
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File under Derbi Exhibitions New Products
Author: Mike Werner
Location: Normandy, France
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Spanish motorcycle manufacturer Derbi, is one of those unknown quantities. You don't hear from them for a while, and then suddenly they win the 125 MotoGP worldchampionship, and bring out new motorcycles at the same time. It's almost like they go away and tinker on new motorcycle, away from the spotlights, and then suddenly bring it to the public.
This year they launched several motorcycles, so let's have a closer look at the Derbi GPR 125 4T 4V. Here's what Derbi have to say.
Over 85 years of history, more than 85 grand prix titles won, 19 world motorcycling titles and a history which includes names like Ángel Nieto, Ricardo Tormo, Jorge Martínez “Aspar” or Manuel “Champi” Herreros have bequeathed a rich heritage of knowledge and know-how. The latest creation from the Martorelles brand, the new Derbi GPR 125, owes much to this sporting heritage. Showcased at EICMA in Milan, this supersport model is destined to be the new reference in the 125cc sports bike segment, thanks to its advanced technological features and the quality of its ride.
To achieve the model’s full potential, the new Derbi GPR 125 has been designed from scratch. From the frame to the front and rear suspension, the instrument panel, the bodywork, the brakes, all is new on this new model. Its size is a far cry from the current GPR, since an effort has been made to approach a high performance model, bringing the dimensions nearer to a 600cc rather than to a more modest 50cc model.
The new GPR's riding position is much more comfortable than it usually is for this segment, an intelligent choice to satisfy the needs for everyday users. This has been achieved thanks both to its large size and well thought ergonomics.
The motorcycle
At the front, the job of maintaining solid contact with the ground is efficiently carried out by the front suspension with an upside down 40mm diameter fork, a real first for this segment.
The rear asymmetric swing arm merits a paragraph all to itself. Here, we are looking at a genuine work of engineering with the unmistakable stamp of uniqueness. On the right hand side, it has a variable-section swing arm; that is to say slightly curved upwards at the center. In contrast, on the left hand side it is straight, to leave room for the transmission chain. The rear central shock absorber is directly connected, with no linkage, making for firmer and sportier handling.
No effort has been spared for the chassis either. It is a hollow, perimetral double beam made of die-cast aluminum. The engine is suspended from it, forming a block which gives added rigidity to the assembly. The chassis is screwed together onto the steering axle. The motorbike is controlled by means of semi-handlebars attached below the front fork upper bracket. This is a sporty solution which gives the model a striking aesthetic finish.
Engine
The soul of the new GPR 125 is the single cylinder four-stroke engine with four intake and exhaust valves and developing 15 actual hp. This engine is one of the highest performing in its class, with consumption in the region of 4.2 l/100km. The Derbi GPR 125’s 13-litre tank can therefore offer a total riding range of over 300km. It more than complies with the current Euro 3 emissions standard.
Details for excellence
The braking equipment on the new GPR 125 is of the same quality as the rest of the bike. On the front axle, a 300mm disc is gripped by a two-piston radial brake caliper. The rear brake is of the single-piston caliper type.
Looking at the dashboard on the new GPR 125, one can clearly see the influence of MotoGP bikes. An LCD digital screen incorporates the revolutions counter in a progressive line, the digital speedometer, fuel gauge, total and partial mileage counter and a clock.
For night vision, the GPR has a powerful front headlight with a halogen bulb. At the back, the slim tailpiece which accommodates the passenger seat incorporates a modern light set based on clearly visible, rapid illumination LED technology.
In short, a motorbike born out of Derbi’s experience in World Championship Racing, but for everyday riding.
Technical specifications
| Engine: | Single cylinder 4Stroke 4V Euro 3 | | Bore x stroke: | 58 x 47 mm | | Displacement: | 124.2 cc | | Fuel supply: | Ø 30 Carburetor | | Cooling system: | Liquid | | Starting system: | Electric | | Compression ratio: | 12:1 | | Fuel: | Unleaded petrol | | Lubrication system: | Mechanical Oil pump | | Clutch: | Multi-plate | | Gearbox: | 6 speeds | | Front suspension: | Ø 40 mm Upside down fork. 110 mm travel | | Rear suspension: | Monoshock, 120 mm wheel travel | | Front brake: | Ø 300 mm Disc. Radial Caliper | | Rear brake: | Ø 218 mm Disc. Floating Caliper | | Tyres: | Front: 110/70 x 17”
Rear: 130/70 x 17” | | Maximum length: | 1.977 mm | | Maximum width: | 795 mm | | Wheelbase: | 1.355 mm | | Seat height: | 800 mm | | Fuel tank: | 14 L | | Weight: | 120 kg |
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