I feel like mine was fully worn in around 2K miles (I always write "miles", because many people use kilometers, and don't specify that, and there is a huge difference) It has never been really easy to kick start. I finally quit doing it because I have bad knees, and I put my knees ahead of looking cool starting my bike. There is some clatter, and there always will be. This is not a liquid cooled multi cylinder engine, and will never be smooth. I've even been able to hear some clatter on newer 4 cylinder sportbike engines. Remember this is a machine, and the clearances are not as good as a Japanese bike. There is a huge difference between the sound of an Enfield and the Yamaha SR400. I like the Enfield a lot better, the SR sounds like a sewing machine.