| As we often get asked how to find whether a Powerdynamo system has
      internal or external trigger we give this information below  | 
  
    | Please note: there are
      systems where older versions had external sensor and new version internal.
      Those systems than have however different part numbers and only giving
      vehicle type (such as Adler 250 or Yamaha XS650) is not enough for
      identification. | 
  
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    | a system with internal sensor has left or right (depending on working modus)
    to the larger black coil (ignition pole for spark energy) 2 small
    synchronisation coils which after the rotor has been set will no longer be
    visible. | a system with external trigger das a magnetic sensor outside of rotor (and
    the rotor has one or two protrusions (noses) | 
  
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