Yamaha YZF-R125

Yamaha YZF-R125
2025 Yamaha R125
ManufacturerYamaha Motor Company
Also calledYamaha R125
Production2008–
PredecessorYamaha TZR125
ClassSport bike
Engine124.7 cc (7.61 cu in) liquid-cooled 4-stroke 4-valve SOHC single-cylinder engine
Bore / stroke52.0 mm × 58.6 mm (2.05 in × 2.31 in)
Compression ratio11.2:1
Ignition typeTCI
Transmission6-speed constant mesh, wet, multiple-disc coil spring clutch, chain drive
Frame typeSteel twin-spar Deltabox
SuspensionFront: 41 mm inverted fork
Rear: Swingarm (link type)
BrakesHydraulic disc; front: 292 mm floating disc
Rear: 230 mm
TiresFront: 100/80-17
Rear: 130/70-17 (2008-2013) 140/70-17 (2014+)
Rake, trail25°, 89 mm (3.5 in)
Wheelbase1,325 mm (52.2 in)
DimensionsL: 1,990 mm (78 in)
W: 755 mm (29.7 in)
H: 1,140 mm (45 in)
Seat height820 mm (32 in)
Fuel capacity11.0 L (2.4 imp gal; 2.9 US gal)
Oil capacity1.15 L (0.25 imp gal; 0.30 US gal)
RelatedYamaha YZF-R Series

The Yamaha YZF-R125 is a sport motorcycle designed by Yamaha and manufactured by MBK Industrie since 2008. In 2023 the model is in its fourth generation.