If you want to conduct auto repairs on your own Jawa 350 Chopper then it will always be recommended to possess a Workshop Manual for a reference just in case you want to know the best way to take off a certain component much like the Exhaust and install it again in the correct way.
Jawa 350 Chopper Workshop Manuals will give specific diagnostic guidelines with regards to your car therefore if something is playing up it helps you figure out what the issue is and how to fix it. Then you are able to assess if this can be done by yourself or in the event the job is just too big you could make a booking for your 350 Chopper in with a decent car garage.
Jawa 350 Chopper manual