Yamaha Y125Z

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Yamaha Y125Z / Yamaha Y125ZR
Yamaha Y125Z
PredecessorYamaha Y110SS / Yamaha Y110SS Two
SuccessorYamaha Y135LC
ClassMoped, underbone
Engine124.3 cc cc air-cooled, 2-stroke engine
Cylinder Arrangement = Forward inclined single cylinder
Bore & stroke = 53.8 x 54.7 mm
Power17.5 PS (13 kW) @ 8,000 rpm
Torque1.85 kg·m (18.1 N·m/13.4 ft·lbf) @ 7,500 rpm
SuspensionFront: Telescopic fork
Rear: Monoshock swingarm
BrakesFront: Disc
Rear: Disc
Wheelbase1, 250 mm
Seat height752mm
Weight101 kg
Fuel capacity5.0l
RelatedYamaha Y135LC

Yamaha Y125Z is a 125 cc 2-stroke underbone motorcycle produced by Yamaha. Debuted in 1998 as a successor of Yamaha Y110SS, the Y125Z was the first 2-stroke underbone motorcycle ever being installed with catalytic converter. Beside been sold in most South East Asia country especially in Malaysia & Singapore, it also sold in Greece.


  • Engine: 125 cc air-cooled, 2-stroke engine
  • Displacement: 124.3 cc
  • Max power: 17.5 PS (13 kW) @ 8,000 rpm
  • Max torque: 1.85 kg·m (18.1 N·m; 13.4 ft·lbf) @ 7,500 rpm
  • Max speed: About 178 km/h (111 mph)
  • Bore x stroke: 53.8 mm (2.1 in) x 54.7 mm (2.2 in)
  • Compression ratio: 6.5 : 1
  • Transmission: 6-speed return
  • Clutch: Wet multi-plate manual clutch
  • Frame Type: Underbone twin tube frame
  • Suspension (F): Telescopic
  • Suspension (R): Monoshock
  • Brake (F): Disc
  • Brake (R): Disc
  • Dry Weight: 101 kg (223 lb)

Yamaha Y125Z in motorsports

The Yamaha Y125Z is widely used in motorcycle racing tournaments held in Malaysia or Asean level. In Malaysia, the Y125Z is widely used in the Expert category of Malaysian Cub Prix tournament series.

See also