Ok.
when you kick it over does the kickstart feel loose or very hard to push down?
You need to check for a spark? take plug out pop back in hT lead and rest end of plug against cylinder head or something metal. now try and start. you should see plug sparking. you may need a mate to help to see. if it is, a nice bright blue spark then pop a small amount of petrol down bore hole and pop plug back in. Does it fire?
It does sound to me as though you have a more serious issue though, piston rings or such like?
bb
June 2010