If you wish to conduct adjustments to your Jawa 350 Chopper then it is usually a great idea to have access to a Workshop Manual to use as reference in the event that you want to know simple methods to strip off a particular part for example the Brake Pads and fit it again in the correct way.
Jawa 350 Chopper Workshop Manuals will give exact diagnostic guidelines on your vehicle therefore if something is not working it can help you figure out what the issue is and methods to make it better. You will be able to decide if this can be done by yourself or in case the job is just too big you can actually make a reservation for your 350 Chopper in with a nearby car garage.
Jawa 350 Chopper manual