2013 Rieju MRT Pro 50. Hi all, my daughters MRT 50 has an error code 05 when she starts up. Also when she puts it in gear the speedo goes blank ( off )

Clean the throttle body.

Question edited for clarity and spelling of Rieju / Reiju.
Question moved from Cars and Trucks.

This is your Workshop Manual and the section on errors.

https://www.manualslib.com/manual/1088567/Rieju-Mrt-50.html?page=68&term=error&selected=1#manual

Owners manual and equally as useless, although it does give some maintenance tips.

https://www.manualslib.com/manual/1079411/Rieju-Mrt-50.html

This gives some clues in the Aprilia Forum.

https://www.apriliaforum.com/forums/showthread.php?320791-Electrical-issue

It is often a problem buying unknown makes and trying to get support. None of the manuals give contact information.

https://www.google.com/search?q=2013+rieju+mrt+50%2C+error+code+05

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