Joined Aug 2004
32 Posts | 0+
Kristinehamn, Sweden
I have read some of the posts regarding the SEM ignition system. I have a FE501-02 with SEM ignition. Last year i had to replace the stator and "flywheel" because of a failure in the charging coil. Everything has worked fine until a a week ago when the bike suddenly stopped and was impossible to start. After some minutes it started again but stopped again. Now it runs, but it can only be started with the electrical starter (only sometimes with the kick). I suspect a submersion during a race three weeks ago, but the berg has worked fine after that (After oil change, clean carburator, drying all parts etc.) I have changed the ignition cap and wire, but no major difference. I have also measured the resistances in the coils and the are all fine. The output from the coils (measured with a multimeter on AC) when cranking with the electrical starter is ~3V from the pickup coil (the green wire) and ~30 V from the charging coil (the red wire). I can also see sparks in the spark plug when cranking with the electrical starter but not (or seldom) when using the kick. Is this likely to be a problem with the CDI? When cranking with electrical starter the CDI is fed with 12V, is this the reason for sparks only when using the starter? Also when running the engine at very low revs it stops.