If you have to accomplish maintenance tasks on your Jawa 639 Chopper 350 then it will always be a good plan to have a Workshop Manual to keep just for a guide just in case you want to know how you can take off a certain part for example the Exhaust and fit it again perfectly.
Jawa 639 Chopper 350 Workshop Manuals provide you with specific diagnostic facts for the automobile therefore if something is playing up it can help you understand what the issue is and tips to repair it. You can then determine if you can do this yourself or in the event the job is too big it is possible to book your 639 Chopper 350 in to a suitable garage.
Jawa 639 Chopper 350 manual