The R-Series Pedigree: YZF-R125 Model Evolution A record of all major model changes to the YZF-R125 2008 2014 2019 2021 Styling created to closely link to the R-Series Liquid-cooled 4-stroke SOHC, 4-valve, single-cylinder engine Deltabox frame New fairing with center intake duct Inverted front fork LED taillight New engine with Variable Valve Actuation (VVA) Assist & Slipper clutch New aluminum swingarm New 11-liter fuel tank ABS, radial-mount opposed-piston 4-pot front brake caliper 140 mm wide rear tire EU5-compliant Overall length 2015mm 1950mm 1990mm ← Overall width 660mm 695mm 755mm ← Overall height 1065mm ← 1140 mm ← Seat height 818mm 825mm 820 mm ← Wheelbase 1355mm 1355mm 1325 mm ← Wet(with oil and a full fuel tank) 138kg 140kg 142kg 144kg Engine type 4-stroke ← ← ← Cylinder arrangement Single cylinder ← ← ← Displacement 124.45 cm3 ← ← ← Bore & stroke 52.0 x 58.6 mm ← ← ← Compression ratio 11.2 : 1 ← ← ← Maximum horse power 11.0 kW at 9000 r/min ← 11.0 kW at 10000 r/min ← Maximum torque 12.4 Nm at 8000 r/min ← 11.5 Nm at 8000 r/min ← Lubrication system Wet sump ← ← ← Engine oil capacity 1.15 L ← 1.05 L ← Fuel tank capacity 13.8L 11.5L 11L ← Frame type Diamond ← ← ← Caster angle 25° ← 26° ← Trail 93mm ← 95mm ← Steering Angle 29.5° ← 32° ← Tire size(Front) 100/80-17M/C 52H(Tubeless) ← 100/80-17M/C 52S(Tubeless) ← Tire size(Rear) 130/70-17M/C 62H(Tubeless) ← 140/70-17M/C 66S(Tubeless) ← Rim size(Front) 17XMT2.75 ← ← ← Rim size(Rear) 17XMT3.75 ← 17XMT4.00 ← Brake type(Front) Hydraulic single disk ← ← ← Brake type(Rear) Hydraulic single disk ← ← ← Diameter of brake disk(Front) 292x4.5 ← ← ← Diameter of brake disk(Rear) 230x4 ← 220x4 ← Inside diameter of drum / Effective diameter of disc(Front) 256 ← ← ← Inside diameter of drum / Effective diameter of disc(Rear) 195 ← 191 ← Suspension type(Front) Telescopic Telescopic / Inverted ← ← Suspension type(Rear) Swingarm ← ← ← Shock absorber assembly type(Front) Oil damper/coil spring ← ← ← Shock absorber assembly type(Rear) Oil damper/coil spring ← ← ← Wheel travel(Front) 130mm ← ← ← Wheel travel(Rear) 125mm 114mm 110mm ← Inner tube diameter of front fork 33mm 41mm ← ← Headlight bulb type Halogen bulb ← LED ← Headlight H7, 55.0 W x 2 ← Low Beam LED 5.7W - High Beam LED 13W ← Auxiliary light 5.0 W x 2 ← Position Light LED 0.3W x 2 ← Brake/tail light LED ← Stop Light LED 3W - Tail Light LED 1W ← Turn signal light(Front) 10.0 W x 2 ← ← ← Turn signal light(Rear) 10.0 W x 2 ← ← ← Speedometer LCD : Digital LCD : Digital LCD : Digital LCD : Digital The R-Series Pedigree