If you have to carry out auto repairs on your Jawa 330 Style then it is usually recommended to own a Workshop Manual to keep just for reference in the event that you want to know how to take out a certain part such as the Brake Pads and fit it again adequately.
Jawa 330 Style Workshop Manuals will provide you with targeted diagnostic info for your vehicle so if something is faulty it can help you work out what the issue is and the way to fix it. You can then evaluate if this can be done on your own or if the job is too big you can actually make a booking for your 330 Style into a nearby repair garage.
Jawa 330 Style manual