The Yamaha R15 set the benchmarks quite high when it was launched .This is the First Indian made model with liquid cooled Engine. Liquid Cooled Engine provide stable performance, reduce vibrations, and offer a high quality ride. The engine is surrounded by a water jacket in which coolant liquid circulates to cool the engine.The frame, which forms the basis for riding comfort and handling performance, is a deltabox frame which delivers superior rigidity balance.First Indian made model with aluminium long rear arm which improves handling in the turns. It has a truss structure that enables greater rigidity.The Diasil Cylinder was born from YAMAHA’s world-class aluminium die casting technology. Diasil Cylinders are all-aluminium cylinders made by YAMAHA’s proprietary aluminium die casting technology.when you drive R15 you will feel like the king of the world .