If you have to undertake fixes to your Rieju Tango 50 SM then it will always be a great idea to own a Workshop Manual to use as personal reference should you need to know tips to take off a specific part such as the Exhaust and install it again in the correct way.
Rieju Tango 50 SM Workshop Manuals can provide specific diagnostic guidelines for your car or truck therefore if something is wrong it will help you discover what the issue is and tips to correct it. After that you can evaluate if you can do this yourself or that the job is too big you could make a booking for your Tango 50 SM right into a trusted mechanic.
Rieju Tango 50 SM manual