update: keeping the story short
Cleaned the stator& pickup. It fired up, wnet out for a blip, cut out on me a few times, cleaned it again, started up, bliped out done it again, got the van got me back to the garage, after that time elapsed just kicked it over 1st time and it started. Was adjusting the carb mixture then all a sudden it died. We had tried & placed everything electrical with spare parts i had and nothings wrong with them.
Conclusion: Everytime the stator gets hot the bike dies. A new stator is the only thing left for me to try out, it has to be that, everything else has been checked.
summary: Bloody hell I LOVE 140 Lifan !
. Great when its going.