Hero — Hero ismart 110 sound problem for engine

Address:	Jaunpur, Uttar Pradesh, 222002
Website:	www.heromotocorp.com

Hi
Ir
My name is alok kumar yadav mo no.[protected] i purchased hero ismart 110 before 4 month ego facing unknown sound from engine

After my first service i was facing the sound problem from engine like (Kar kar). I drop the bike for repair and they charged from me as there is not my fault it was manufacturing defect. After receive the bike same problem comes in my bike and the kar kar sounds is too loud day by day.