If you wish to do adjustments on your own Honda CB 250 K 1 then it is usually a good plan to have a Workshop Manual for reference just in case you need to know ways to remove a certain component much like the Brake Discs and match it again in the right way.
Honda CB 250 K 1 Workshop Manuals gives you specified diagnostic wisdom with regards to your car or truck so if something is playing up it will help you determine what the issue is and how you can fix it. You will be able to analyse if this can be achieved yourself or that the job is just too big you are able to book your CB 250 K 1 in with a suitable car garage.
Honda CB 250 K 1 manual