What is the Euro Standard followed by Yamaha?
In India BSES (Bharat Stage Emission Standards) are prevalent not Euro standards. Bharat stage emission standards are emission standards instituted by the Government of India to regulate the output of air pollutants from internal combustion engine equipment, including motor vehicles. The standards and the timeline for implementation are set by the Central Pollution Control Board under the Ministry of Environment & Forests and climate change. The standards, based on European regulations were first introduced in 2000. Progressively stringent norms have been rolled out since then.
For two wheelers the standard followed by Yamaha for 2013 model is Bharat Stage IV it is reference to Euro 4 standard.