Q. Give details about the engine of Yamaha R15 V4.

The Yamaha R15 V4 is powered by a 155cc, liquid-cooled, 4-stroke, SOHC, 4-valve engine. Here's a breakdown of its key features and specifications: * Engine type: Liquid-cooled, 4-stroke, Single Overhead Camshaft (SOHC), 4-valve * Displacement: 155 cc * Power: 18.4 PS @ 10,000 rpm * Torque: 14.2 Nm @ 7,500 rpm * Compression ratio: 11.6:1 * Fuel system: Fuel injection * Cooling: Liquid-cooled * Starting: Electric start * Transmission: 6-speed constant mesh * Clutch: Wet, multi-plate * Bore x Stroke: 58.0 mm x 58.7 mmKey Technologies: * Variable Valve Actuation (VVA): This technology optimizes valve timing for better performance across the rev range, improving both low-end torque and high-end power. * Assist and Slipper Clutch: This makes clutch operation lighter and prevents wheel lockups during aggressive downshifts. * DiASil Cylinder: Yamaha's DiASil (Die-cast Aluminum Silicon) cylinder offers excellent heat dissipation and reduces engine wear.Performance:The engine is known for its smooth power delivery and good performance in its class. It offers a balance of sporty character and decent fuel efficiency.Overall:The Yamaha R15 V4's engine is a refined and technologically advanced unit that contributes to the bike's overall performance and riding experience.

The Yamaha R15 V4 is powered by a 155 cc air-cooled engine which produces 18.4 PS @ 10000 rpm of power. It has a fuel tank of 11 L and a claimed mileage of 55.20 kmpl.