Motorcycle Racing News Derbi GPR 50 and 125 | Euro Preview

Derbi GPR 50 and 125 | Euro Preview

Derbi Motorcycles

Whenever I’m in Spain I find myself ogling the really cool mini roadrace motorcycles racing in and out of traffic.

Youthful displays of speed and daring on motorcycles are as much a part of the Spanish culture as cigarettes and long siestas.

The ever-present scent of two-stroke exhaust and the sound of diminutive motors tapped at full throttle are imbedded in the Spanish psyche, leaving little wonder how the region has managed to produce such top caliber racers as Dani Pedrosa, Jorge Lorenzo, and Carlos Checa.

The leading manufacturer of these fully faired pint-sized motorcycles is Barcelona-based Derbi, which owns a significant portion of the small displacement motorcycles so essential to the Spanish way of life; whether you’re talking functional transportation or stylish sporting fun.

Derbi has garnered 19 125cc World Championships in a storied history devoted entirely to small displacement development.

Transforming that rich racing legacy into street legal application are the Derbi GPR 50 (2-stroke) and the GPR 125 (4-stroke).

The two Derbi GPR models have a surprisingly aggressive big motorcycle presence for such small motorcycles. At first glance one might think they’re looking at a top-tier 600 or superbike.

The 50cc version is intended as the ultimate entry-level machine for young and beginning riders while the 125 is better suited for some experience and makes a more practical commuter (while also providing some spirited weekend romping on twisting back roads).

Both Derbi motorcycles sport an aluminum twin beam perimeter chassis with gull wing-design swingarms. A full fairing with wedged tail section give the bikes racing aerodynamics while rear-set footpegs, drop bars, inverted forks, disc brakes and under-slung exhaust pipe reinforce the racing persona.

The GPR 50cc and 125cc engines are carbureted and liquid-cooled with electric start. No power output was available for the 50cc, but the 125cc is claimed to produce 15 hp at 9,250 rpm.

Both bikes have six-speed gearboxes and are fitted with 12-spoke, 17″ wheels.

With cool small displacement motorcycles like the Derbi GPR 50 and GPR 125, lenient traffic cops, and plenty of smooth, twisting pavement, it’s no wonder Spain owns all the MotoGP world titles for 2010.

And right now, dashing through the streets and villages of Spain, another generation of world champions is getting their first taste of speed and adrenaline courtesy of Derbi.

Technical Specifications: 

Derbi GPR 50 (2-stroke) 

Engine

Single cylinder 2

stroke

Bore x stroke

39.86 x 40 mm

Engine capacity

49.9cc

Carburetor

Carburetor Æ17.5

Cooling

Liquid

Starting

Electric

Starter

Compression

ratio

11.5:1

Fuel

Unleaded petrol

Lubrication

System

Oil pump

Clutch

Multi-plate

Transmission

6 speeds

Front

suspension

Ø41 mm Upside down

fork. 110 mm travel

Rear suspension

Monoshock

absorber. Stroke 130 mm

Front brake

Æ300 mm Disc

Rear brake

Æ218 mm

Disc

Tires

Front: 100/80 x

17”

Rear: 130/70 x 17”

Total length

2,015 mm

Maximum width

720 mm

Center to

center distance

1,355 mm

Saddle height

810 mm

Fuel tank

capacity

13 l

Curb weight

110 kg

 Derbi GPR 125 (4-stroke)

Engine

Single cylinder 4 stroke 4V EURO 3

Bore x stroke

58 X 47 mm

Engine capacity

124.2cc

Power

15 hp at 9,250 rpm

Carburetor

Carburetor Æ30

Cooling

Liquid

Starting

Electric

Compression

ratio

12:1

Fuel

Unleaded petrol

Lubrication

System

Dry sump

Clutch

Multi-plate

Transmission

6 speeds

Chassis

Perimeter frame in

die-cast aluminium

Swingarm

Double asymmetric

arm

Front

suspension

*41 mm Upside down fork; Travel 110 mm

Rear suspension

Monoshock absorber. Stroke 130 mm

Front brake

Æ300

mm Disc

Rear brake

Æ220

mm Disc

Tires

Front: 100/80 x 17”

Rear: 130/70 x 17”

Maximum Length

2,015 mm

Saddle height

810 mm

Maximum width

720 mm

Center to

center distance

1,355 mm

Fuel tank

capacity

13 l

Curb weight

120 kg

 

Ron Lieback
Ron Lieback
One of the few moto journalists based on the East Coast, Ron Lieback joined the motorcycle industry as a freelancer in 2007, and is currently Online Editor at Ultimate Motorcycling. He is also the author of "365 to Vision: Modern Writer's Guide (How to Produce More Quality Writing in Less Time).

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