Yamaha R125
15 hp, 124 cc, 142 kg2019
BMW HP4
193 hp, 999 cc, 199 kg2014 - 2015
MetricUS
EngineYamaha R125BMW HP4
Displacement124 cc999 cc
Max power15 hp (@10 000 RPM)193 hp (@13 000 RPM)
Max torque11 Nm (@8 000 RPM)112 Nm (@9 750 RPM)
Redline10 000 RPM14 200 RPM
Idling speed1 200 RPM1 200 RPM
ManagementFuel InjectionFuel Injection
LayoutSOHC SingleDOHC Inline-4
Compression11.20:113.00:1
Oil capacity1.20 litre3.50 litre
Oil type5W40, Motul 300V 5W40
Spark plug typeNGK LMAR9D-J
CoolingLiquidLiquid
Valves416
Bore52.0 mm80.0 mm
Stroke58.6 mm49.7 mm
Throttle bore48.0 mm
Weight to power9.47 kg/hp1.03 kg/hp
Power to weight105 hp/Ton969 hp/Ton
Battery type12V 5.5Ah12V 7Ah
GearboxYamaha R125BMW HP4
TypeSequentialSequential
ClutchWetWet
DriveChainChain
Chain type
Gears count66
Primary ratio3.0421.652
Final drive3.422.588
1. gear2.833 (39 km/h)2.6471 (152 km/h)
2. gear1.875 (59 km/h)2.091 (192 km/h)
3. gear1.364 (82 km/h)1.727 (232 km/h)
4. gear1.143 (97 km/h)1.5 (267 km/h)
5. gear0.957 (116 km/h)1.36 (295 km/h)
6. gear0.84 (132 km/h)1.261 (318 km/h)
ChasisYamaha R125BMW HP4
Frame typeSteel deltaboxAluminium composite bridge frame
Front susp.KYB 41mm USD, 130.00 mm travel46mm USD, 120.00 mm travel
Rear susp.Swingarm monoshock, 114.00 mm travelAluminium swingarm, 130.00 mm travel