What do you mean clutch cable gets hot? The clutch cable goes into transmission on the left side of the bike and should never get hot. Which cable are you talking about?
Sounds like possible ignition problem. Generally when the ignition starts to go it makes it difficult when hot. The next time that happens take the timing cover off and see if the little red light is working. Should go off and on, but if not working at all then you know what it is.
Good video showing the ignition.
http://www.youtube.com/watch?v=vCBtfz0toRw
ALso check grounds, front and rear.
Anyone know how to post videos in this forum? Have tried every witch way with no luck.