If you wish to perform maintenance on your Kawasaki ER 6f then it will always be a good idea to have access to a Workshop Manual to keep just for personal reference if perhaps you need to know the right way to remove a specific part like the Clutch and fit it again successfully.
Kawasaki ER 6f Workshop Manuals are able to offer distinct diagnostic guidelines with regards to your car so if something is not working it can help you determine what the situation is and tips on how to repair it. You can then evaluate if this can be done yourself or that the job is just too big you can make a reservation for your ER 6f into a trusted repair garage.
Kawasaki ER 6f manual