I was experiencing kirr kirr sound at the time of cold start and afterwards this sound used to convert into ghrr ghrr sound audible at RPM between 1800 to 2500. I showed it to HONDA DRIVE INN but they called it engine sound and told not to worry (As the engine was not cold therefore the kirr kirr sound was not coming). So, i showed it to my mechanic. He observed it keenly and then the fault was detected to be a loosened generator. After it was fully tightened, there was no such sound even at the time of cold start in morning.
Moreover my car's clutch bearing was also making sound like cheer cheer at the time of pressing. It also resolved when he gave oil to the bearing with oil pump.