Powerdynamo brings new ignition & light 
to your vintage motorcycle



Technical Help



correct position between sensor and trigger nose is important for operation of external sensor triggered systems

click picture to enlarge

As a result of all sorts of things (notable such as crankshaft modifications) it may happen that the rotor sits higher or lower than conceived. In the case of external trigger systems it may mean loss of spark.

Make sure that sensor (the metal core in its middle) and trigger plate on rotor circumference are level.

Here in the picture to the left it would mean that you still might get spark, but at very high starting revs. 

More extreme situations as sketched below will totally suppress sparks.

If the rotor sits too high, you may push the sensor up to the needed level by a spacer plate (we offer 2mm thick plates under part 700030000). A rotor sitting too low needs to be replaced, as it would destroy the coils under it.

Also very important for operation of such systems is correct gap.
0.4 is the standard. 

If gap is wider, starting will be more problematic, right up to impossible if you have values over 0.6-0.7mm