1978 | GP125

Model positioned between the GT125 and the K125 commercial bike


The GP125 debuted as an accessible 125 cm³ street bike. Its 2-stroke 1-cylinder rotary disc valve engine is painted black to create a bolder impression. The engine was designed to emphasize gutsy torque in the low- and mid-rpm ranges with smooth performance at high rpms. It also achieves excellent fuel economy of 55 km/L (50 km/h steady state fuel economy*). This engine is combined with a lightweight diamond frame based on the GT100 to realize higher dynamic performance than the 2-cylinder GT125. Hydraulic front disc brakes equipped with automatically adjusting brake pads deliver stable and powerful braking force.
* Suzuki’s internal test results. Figures may vary depending on the rider’s skill or riding conditions.

Dimensions and weight Dimensions Overall length 1,895 mm
Overall width 750 mm
Overall height 1,055 mm
Wheelbase 1,235 mm
Weight 91 kg (Dry)
Engine Engine type 2-stroke, 1-cylinder, air-cooled
Engine displacement 123 cm³
Bore x stroke 56.0 mm × 50.0 mm
Maximum power 10.3kW(14PS) / 8,000rpm
Maximum torque 12.7N-m / 7,500rpm
Transmission 5-speed constant mesh
Front tire size 2.75-18-4PR
Rear tire size 3.00-18-4PR