If you want to conduct maintenance tasks to your Motorhispania RX 50R then it will always be recommended to have a Workshop Manual to use as reference in the event you need to know ways to take out a specific component including Gearbox and fit it again appropriately.
Motorhispania RX 50R Workshop Manuals will give targeted diagnostic guidelines for your car therefore if something is broken it will help you find out what the situation is and tips to make it better. After that you can evaluate if this can be done yourself or in case the job is too big you are able to make a booking for your RX 50R right into a decent repair garage.
Motorhispania RX 50R manual