Internal combustion engine for two-wheeled vehicle and two-wheeled vehicle thereof

An internal combustion engine (100) for a two-wheeled vehicle (200) is provided. An internal combustion engine (100) includes a crankcase (102) and a vent chamber (104) defined on the crankcase (102). The vent chamber (104) is adapted to separate oil particles in blow-by gas received from the crankcase (102) and to conduct fresh air to an intake manifold of the internal combustion engine (100). A vent cover (106) is mounted to the crankcase (102) and adapted to cover the vent chamber (104). An integrated starter generator (ISG) unit (108) having a stator (108a) and a rotor (108b) is also provided, where the rotor (108b) is coupled to a crankshaft (110) disposed within the crankcase (102), and the stator (108a) is mounted on the vent cover (106). Such a configuration makes the layout of the internal combustion engine (100) compact, thereby reducing the width of the internal combustion engine (100). Moreover, the vent chamber (104) facilitates cooling of the oil, ensuring that the internal combustion engine (10