Derbi GPR
Street motorcycle sold by Derbi
From Wikipedia, the free encyclopedia
The Derbi GPR is a street motorcycle sold by Derbi - Nacional Motor since 2005.[2] The original GPR was powered by a single-cylinder two-stroke engine with a steel lined cast iron cylinder manufactured by Yamaha, but was superseded in 2010 by an all-new DOHC four-stroke four-valve model.[3] It was also sold in a naked variant called Derbi GPR Naked.
A Derbi GPR 50 in 2010 | |
| Manufacturer | Derbi |
|---|---|
| Also called | Gilera SC125 |
| Parent company | Piaggio |
| Production | 2005–present |
| Class | Sport bike |
| Engine | 50–125 cc (3.1–7.6 cu in) 2005-2009: liquid cooled, two stroke[1] 2010-: liquid cooled four stroke[2] |
| Bore / stroke | 2005-2009: 56.0 mm × 50.7 mm (2.20 in × 2.00 in) 2010-: 58.0 mm × 47.0 mm (2.28 in × 1.85 in) |
| Compression ratio | 12.5:1 |
| Transmission | 6-speed |
| Suspension | Ø40 mm upside-down fork. 110 mm. travel Rear: Monoshock. 110 mm travel, Adjustable Preload |
| Brakes | Front: Single 300 mm Hydraulic Disc with Four Piston Radial Caliper Rear: Single 180 mm Disc with Two-Piston Caliper |
| Tires | Front: 110/70-17 Rear: 140/70-17 |
| Wheelbase | 53.34 in (1,355 mm) |
| Dimensions | L: 79.68 in (2,024 mm) W: 28.34 in (720 mm) H: 45.66 in (1,160 mm) |
| Weight | 225 lb (102 kg) (dry) 285 lb (129 kg) (wet) |
| Fuel capacity | 3.4 US gallons (13 L; 2.8 imp gal) |
| Oil capacity | 1.5 litres (1.6 US qt) |
Two-stroke GPR
The engine in the original two-stroke model is sourced from Yamaha. This engine was used in the Yamaha DTR125 Dual Sport and TZR125 sport bike. Engine parts from these two bikes will directly swap with the Derbi. It uses the Yamaha Yamaha Power Valve System, a two-stroke power valve system, which consists of a rotary valve located in the exhaust port which changes the exhaust port timing and area. The power valve is controlled by an ECU and servo motor.
