What is the life of chain sprocket in Royal Enfield Bullet 350?

There is no fixed factory replacement number, but on a Royal Enfield Bullet 350 a chain-sprocket kit commonly lasts around 20,000 to 30,000 km if it is cleaned, lubricated and adjusted on time. It can wear out sooner in heavy rain, dusty use, frequent hard acceleration, or if chain slack is neglecte