Honda CB77AttributeYamaha RX100
305Displacement (cc)98
28 hp @ 9,000 rpmMaximum Power11 PS @ 7500 rpm
2.7 kg·m @ 7,500 rpmMaximum Torque10.39 Nm @ 6500 rpm
28 HP @ 9000 rpmPeak Power11.0 HP (11.0 PS) @ 7500 rpm
2Number of Cylinders1
OHVValve ConfigurationReed Valve (Two-Stroke)
2Valves Per CylinderNot Applicable (Two-Stroke)
55Bore50.0 mm (International Spec)
52Stroke50.0 mm (International Spec)
55 x 52Bore x Stroke50.0 mm x 50.0 mm
9.0:1Compression Ratio6.7:1
Air-cooledCooling SystemAir Cooled
CarburetorFuel Supply SystemCarburetor (Mikuni VM20)
Contact breaker / PointsIgnition SystemCDI (later models) / Point Ignition (early models)
VerticalEngine LayoutStandard
10W-30Engine Oil Grade2 Stroke Engine Oil (Separate oil tank for Autolube)
10000Valve Adjustment Interval—
Electric & KickStarting SystemKick Start
NoEngine Kill SwitchNo
0.177 HP/kgPower-to-Weight RatioNot Available (Old Model)
12VBattery Power105−110 km/h (Factory/Tuned)
—Power Consumption1.3 Litres (Gearbox/Transmission Oil)
—Motor Power10.5 Litres (including reserve)
—Emission Standard35−40 km/L (User Reported)
—Power Mode IndicatorN/A (Known for fast acceleration in its class)