Technical data about the DKW/IFA RT125 being pretty hard to find (part from German stuff), I put online today a DKW RT 125 Care manual (date unknown, between 54 and 57)... Plus, it's in french! (Sorry, you English-speaking reader! )
This is another discovery made on eBay... That I scan for you today, hopefully it could be useful to some others! (drop me a line if so!)
You can download the full manual at once as a Zip archive here : [download manual] (12 pages 990x706, 5.6Mo).