If you choose to do maintenance to your Yamaha LB 70 Chappy then it is always a good idea to have a Workshop Manual to keep just for personal reference in case that you want to know how you can strip off a specific part much like the Clutch and fit it again appropriately.
Yamaha LB 70 Chappy Workshop Manuals will give exact diagnostic guides for the vehicle so if something is broken it will help you ascertain what the problem is and how you can correct it. You can then analyse if this can be achieved by yourself or if the job is too big you can make a booking for your LB 70 Chappy right into a local repair garage.
Yamaha LB 70 Chappy manual