Yamaha YBR 125
10 hp, 125 cc, 287 lbs2005 - 2016
Kawasaki Z400
45 hp, 399 cc, 368 lbs2019 - 2020
EngineYamaha YBR 125Kawasaki Z400
Displacement125 cc399 cc
Max power10 hp (@7 800 RPM)45 hp (@10 000 RPM)
Max torque6 lb ft (@6 000 RPM)28 lb ft (@8 000 RPM)
Redline10 000 RPM12 000 RPM
Idling speed1 250 RPM1 300 RPM
ManagementFuel InjectionFuel Injection
LayoutSOHC SingleDOHC Inline-2
Compression10.00:111.50:1
Oil capacity1.14 quart1.89 quart
Oil type10W30, 10W40SAE 10W40
Spark plug typeNGK CR6HSANGK LMAR9G
CoolingAirLiquid
Valves28
Bore54.0 mm70.0 mm
Stroke54.0 mm51.8 mm
Throttle bore32.0 mm
Weight to power28.66 lbs/hp8.18 lbs/hp
Power to weight87 hp/2500lbs305 hp/2500lbs
Battery typeYTX7L-BS, 12V 6Ah12V 8Ah
GearboxYamaha YBR 125Kawasaki Z400
TypeSequentialSequential
ClutchWetWet
DriveChainChain
Chain type520
Gears count56
Primary ratio3.42.219
Final drive3.0712.929
1. gear2.643 (26 mph)2.929 (45 mph)
2. gear1.778 (39 mph)2.056 (65 mph)
3. gear1.316 (53 mph)1.619 (82 mph)
4. gear1.045 (66 mph)1.333 (99 mph)
5. gear0.875 (79 mph)1.154 (115 mph)
6. gear1.037 (127 mph)
ChasisYamaha YBR 125Kawasaki Z400
Frame typeDiamond steelTrellis frame
Front susp.Telescopic fork, 110mm41mm fork, 4.72 in travel
Rear susp.Swingarm, 4.13 in travelMonoshock, 5.12 in travel