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generator / electronic ignition for BMW flat twin

70 81 999 017
=> €/$

for R50, R51/3, R51S, R60, R67, R67/2, R67/3, R69
with 17mm crankpin (measured at wide end)

70 81 999 020
=> €/$

for R50/2 (not for stock 12V types), R50S, R50US, R60/2, R60US, R69S, R69US
with 20mm crankpin (measured at wide end).

Note, please see info on R68 camshafts
Note, not for BMW modified with aluminium flywheel, why is explained here

Magneto with integrated solid state ignition, output at 12V/150W DC. Ignition with own power supply from within the system. Replaces old generator L45/60L, regulator, magnet unit, centrifugal advance unit in above listed BMW with either 17 or 20mm crankpin (measured at wide end).

Does not require changes on crankcase. The system is technically capable of running without battery.All the 12v components are out of sight behind the front engine cover or tucked under the tank. No extra wires run to the headlight--the bike looks completely stock. The difference you will notice is how much easier the bike starts and runs, and a much improved lighting system..

System 70 81 999 has ignition triggered on crankshaft which not only eliminates wear between crank and cam influencing ignition, but also frees the camshaft place to install de the ignition coil there (as this system does)
Advantage over original system:
  • all parts are new
  • solid state ignition and advance
  • more light output
  • very stable ignition with solid spark
  • better starting, better fuel burning
  • no wear anymore on collector, governor and points
Documentation: We like to thank Joel Rapose who distributes those systems in the US for us for his kind permission to use some of his pictures in our information here.
Joel´s well illustrated instructions neatly complement our instructions are are an excellent help in better understanding installation.