generator/electronic ignition fitting Simson "bird series" where base plate is fixed by clamps (not screwed)
as well as Simson SR50/1 , S51/1, S70/1, SR80/1 (without E-start), DUO 4/1 

Your bike drives then only with DC, the complicated AC/DC-mixture will be omitted.

info on differences to MZA systems here 

• all parts are new
• more light output
• very stable ignition with solid spark
• better starting, better fuel burning
• no wear anymore on points
• because of the new regulator/rectifier you can drive without battery without an additional capacitor

• assambly instructions
• wiring diagram
• parts in the pack (photo)

• the new system mounted at the engine and inside the battery case (S51)
• rotor at ignition point
• assembly advise of a satisfied customer