thanks to paul for the help given in chosing a new motor (6hp four stroke with clutch and chain and sprocket to suit)
the new motor I bought from paul is great (6hp four stroke with clutch and chain and sprocket to match) it replaced a two stroke pain in the butt motor.
fitted it to the kart with little mods to get it work properly( the kart,not the motor)
I'm in sydney and the shipping was no problem at all and quick,
so easy to start, one pull of the start cord and off they go, straigt fuel no mixing ,how easy , all I hear now is, my turn, my turn
thanks paul