Looking at the tank shape, its a ts125sport, a fairly rare model created by Wilf Green (the importer) to bring the bikes looks up to date. Well for the 1980's anyway
If you look in the DDR era gallery you will see a red one. The one picture in your gallery labelled mess seems to be an es250, all that wiring is an aftermarket 12v conversion with electronic ignition, from Powerdynamo.