Yamaha YBR 125
10 hp, 125 cc, 287 lbs2005 - 2016
Aprilia Shiver 750
95 hp, 749 cc, 463 lbs2010 - 2016
EngineYamaha YBR 125Aprilia Shiver 750
Engine codeM551M
Displacement125 cc749 cc
Max power10 hp (@7 800 RPM)95 hp (@9 000 RPM)
Max torque6 lb ft (@6 000 RPM)59 lb ft (@7 000 RPM)
Redline10 000 RPM10 000 RPM
Idling speed1 250 RPM1 400 RPM
ManagementFuel InjectionFuel Injection
LayoutSOHC SingleDOHC V-twin
Compression10.00:111.00:1
Oil capacity1.14 quart3.03 quart
Oil type10W30, 10W4015W50
Spark plug typeNGK CR6HSANGK CR7EKB
CoolingAirLiquid
Valves28
Bore54.0 mm92.0 mm
Stroke54.0 mm56.4 mm
Throttle bore52.0 mm
Weight to power28.66 lbs/hp4.87 lbs/hp
Power to weight87 hp/2500lbs512 hp/2500lbs
Battery typeYTX7L-BS, 12V 6Ah12V 10Ah
GearboxYamaha YBR 125Aprilia Shiver 750
TypeSequentialSequential
ClutchWetWet
DriveChainChain
Chain type525 ZRPK, 108 links
Gears count56
Primary ratio3.41.868
Final drive3.0712.75
1. gear2.643 (26 mph)2.57 (56 mph)
2. gear1.778 (39 mph)1.88 (76 mph)
3. gear1.316 (53 mph)1.5 (96 mph)
4. gear1.045 (66 mph)1.272 (113 mph)
5. gear0.875 (79 mph)1.13 (127 mph)
6. gear1.041 (138 mph)
ChasisYamaha YBR 125Aprilia Shiver 750
Frame typeDiamond steelStreel tube
Front susp.Telescopic fork, 110mm43mm USD, 4.72 in travel
Rear susp.Swingarm, 4.13 in travelMonoshock, 4.80 in travel