How to change chain spoket

Front or rear sprocket?

I don't have a Ktm but I'd say You need to remove the rear wheel so you can loosen the chain. Then unbolt the sprocket to change it.

@harahitsingh you are not giving us enough information. We will need to have at least a model year as well. Which sprocket. The one on the wheel or the one ion the engine? The sprocket should just be bolted to the sprocket carrier. or are you wanting to know how to do this including the wheel removal. which steps are you looking for. It might also help if you post some pictures of your back wheel and on the engine side so we can see what this all looks like on your bike. Adding images to an existing question