Roadmaster VelocityAttributeYamaha RX100
1890Displacement (cc)98
102Maximum Power11 PS @ 7500 rpm
173Maximum Torque10.39 Nm @ 6500 rpm
94Peak Power11.0 HP (11.0 PS) @ 7500 rpm
2Number of Cylinders1
SOHCValve ConfigurationReed Valve (Two-Stroke)
4Valves Per CylinderNot Applicable (Two-Stroke)
52.4Bore50.0 mm (International Spec)
49.5Stroke50.0 mm (International Spec)
101 x 113Bore x Stroke50.0 mm x 50.0 mm
9.5:1Compression Ratio6.7:1
Air and OilCooling SystemAir Cooled
Electronic Fuel InjectionFuel Supply SystemCarburetor (Mikuni VM20)
TransistorizedIgnition SystemCDI (later models) / Point Ignition (early models)
V-TwinEngine LayoutStandard
10W-40Engine Oil Grade2 Stroke Engine Oil (Separate oil tank for Autolube)
24000Valve Adjustment Interval—
ElectricStarting SystemKick Start
YesEngine Kill SwitchNo
0.51Power-to-Weight RatioNot Available (Old Model)
Euro 5Emission Standard35−40 km/L (User Reported)
NoPower Mode IndicatorN/A (Known for fast acceleration in its class)
—Power Consumption1.3 Litres (Gearbox/Transmission Oil)
—Motor Power10.5 Litres (including reserve)
—Battery Power105−110 km/h (Factory/Tuned)