If you choose to execute fixes on your own Jawa 640 Style 350 then it will always be a good plan to have access to a Workshop Manual to use as a reference in case you need to know the right way to take off a certain part for instance the Drive Shaft and match it again perfectly.
Jawa 640 Style 350 Workshop Manuals provide you with unique diagnostic facts for your car or truck therefore if something is faulty it helps you understand what the situation is and easy methods to resolve it. Then you are able to evaluate if this can be done yourself or in case the job is simply too big you can still make a booking for your 640 Style 350 into a local repair garage.
Jawa 640 Style 350 manual