If there is carbon accumulation on the transmission chain, it can be removed by chemical or mechanical methods on the premise of ensuring that no harming the chain. The former is to directly dip the transmission chain in the prepared chemical solution, wait until the carbon softening loose after the parts out, and brush or cotton silk wipe, after washing with hot water.And latter is to use the tool such as metallic brush, shovel knife to eliminate carbon deposit, although simple, but very difficult to remove carbon deposit completely.