Hopefully this will save some one many hours of frustration.
Fault :-
Intermittent spark, sometimes no spark at all (once died while idling on stand) sometimes ran good up to half revs and then bogged, hard to start and then back fired when it felt like it.
After doing reeds, rings, crank case seals, wiring loom, changing stator coil,CDI,HT coil all it needed was a 5 sec spray of contact cleaner in the loom and CDI connecting plug.....all faults gone
This is the first time my 05 300 has ever given trouble, if there is a next time I would like a easy fault!
