If you have to do maintenance on your Yamaha RZ 50 then it is usually recommended to possess a Workshop Manual to use as personal reference in the event that you need to know the way to take off a particular component including Gearbox and match it again appropriately.
Yamaha RZ 50 Workshop Manuals provides particular diagnostic facts for your car or truck so if something is broken it helps you find out what the issue is and tips to correct it. You can then analyse if this can be achieved yourself or in case the job is too big you can still make a reservation for your RZ 50 in to a suitable repair garage.
Yamaha RZ 50 manual