Why isnt My 2002 yamaha blaster 200 starting?

okay this is the story im riding my quad thinking that it was all good then i stop for a brief second to wait for my cousin then i put the bike in neutral give it a lil gas so it wont turn off ,see my cousin put it into first gear and then as im going up this hill the atv just blows out a cloud of smoke and then just dies and now it wont turn on! can any one help please !!!!!!!!!!!!!