got the same problem, it's not the condenser though, had two maggies on it both good the first just reconed, both work fine on the Flash, both give a warm start problem on the Rocket spec Flash, so I'm still thinking flooding when warm although last time there was no spark but I suspect NGK plugs don't seem to like getting wet, it's not so bad on Champion.
Could it be the insulator absorbs petrol and shorts out?
Tried it last time I had it out (stopped on the top of a hill) it did start but after about five kicks, this was immediately after stopping .
Could be there's a warm start technique needed, one I have not discovered as yet