Yamaha YZF-R125

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Yamaha YZF-R125
Yamaha YZF-R125
Production2008 - present
ClassSport bike

The Yamaha YZF-R125, introduced in 2008, is a sport bike manufactured by Yamaha Motor Company.

Model Information

The YZF-R125 is Yamaha's first 125cc production supersports bike. The YZF R125 is a high revving, fuel injected 125cc sports bike aimed at competing with the Aprilia rs 125 and Honda's CBR 125. The bike features the R stylings similar to its bigger brothers, the legendary YZF-R1 and YZF-R6 supersport bikes. Its liquid-cooled, 4-stroke, single cylinder, SOHC engine is tuned to deliver free-revving performance right through to maximum power at 9,000rpm with a 6-speed gearbox.


  • Engine type: Liquid-cooled, 4-stroke, single cylinder, 4-valve, SOHC
  • Engine Sizet: 124.66 cc
  • Bore x stroke: 52.0 x 58.6 mm
  • Compression ratio: 11.2 : 1
  • Max power: 11.0 kW (15 PS) @ 9,000 rpm
  • Max torque: 12.24 Nm (1.25 kg-m) @ 8,000 rpm
  • Carburettor: Fuel injection
  • Clutch type: Wet, multiple-disc coil spring
  • Ignition system: TCI
  • Starter system: Electric
  • Transmission system: Constant mesh, 6-speed
  • Final transmission: Chain
  • Fuel tank capacity: 13.8 L
  • Front suspension adjustment: None
  • Rear suspension adjustment: Preload only
  • Front brakes: Brembo two-piston sliding caliper, 292mm disc
  • Rear brake: Single-piston caliper, 230mm disc
  • Front tyre size: 100/80-17
  • Rear tyre size: 130/70-17


  1. YZF-R125 2009 Specifications from Yamaha Motors