Derbi GPR125

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GPR 125 Racing
Manufacturer Derbi
Also called Gilera SC125
Parent company Piaggio
Production 2005–
Class Sport bike
Engine 124.76 cc (7.613 cu in) liquid cooled, two stroke
Bore / stroke 56.0 mm × 50.7 mm (2.20 in × 2.00 in)
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)
Related Derbi GPR 125 Nude, Derbi GPR 50 Racing & Nude, Gilera SC 125 & Moto 125sc

The Derbi GPR 125 is a street motorcycle sold by Derbi - Nacional Motor since 2005. The original GPR125 was powered by a single-cylinder two-stroke engine with a steel lined cast iron cylinder manufactured by Yamaha, but this bike has now been superseded by an all-new DOHC four-stroke four-valve model.

Two-stroke GPR125[edit]

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. Now using a four-stroke.

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