Powerdynamo brings new ignition & light 
to your vintage motorcycle



Technical Help



generator / ignition for BMW flat twin

70 80 999 017
follow up system is 
70 81 999 017

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

70 80 999 020
follow up system is 
70 81 999 017

for R50/2 (not for 12V "Behörde"), 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

Magnet based generator 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. Does technically not require battery to run.

For BMW with only narrow tank tunnel see our alternative system 70 81 999 0XX. Difference is that on system 70 81 999 trigger unit is crankshaft based freeing camshaft area to either accomodate ignition coil.
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, govenor and points