Hero Motocorp Ltd, India's largest maker of motorcycles and scooters, said on Monday its sales for the month of May fell 5.4 per cent from a year earlier.
Hero sold 569,876 two-wheelers in May versus 602,481 vehicles in May 2014.
Since its split from Japan's Honda Motor Co in 2011, Hero has been investing heavily in technology to develop new bikes and increasing its push into overseas markets.