It should be as easy as finding TDC,when cold use choke,find TDC,NO throttle,key on and a nice healthy kick.When warm use the same method but without the choke.When mine was warm but found the tyres pointing towards the sky during the odd trail ride i would stand the bike upright,turn the fuel and ignition off,open the throttle all the way and give the bike about half a dozen gentle kicks through then turn the key and fuel on,find TDC and kick it over and wallah!
cheers Dale.
P.S. if it is harder than this start looking elsewhere, like plug,electrics etc.