My new duke 250 is giving out this extra noise lately. It's some kind of a clicking noise that i hear when I go near the engine. I wonder what it is and where it's from. When I checked with the internet some have said that it could be the tappet sound or that the chain tensioner could have gone loose. It's a new bike, not even the first service has been done yet and I face this problem. It really hurts. Does anyone know what could be the possible reason and how to solve it?