hi can any one shed light on my starting probs?

last week i pulled up at traffic lights and bike revs dropped and bike cut out went to start it but all got was a clicking from the starter relay so had to push it somewhere safe was gutted after a while i thought id try and bump start it worked ok after bumped it lol got home tried to start it fired up fine tried next day again fine went to fire her up this morning to go to the bike demonstration and all i got was clicking again so changed the starter relay with a spare i brought still same clicking noise im at a loss as to what the prob could be any one have any ideas its a vfr 750 1990 i got battery on charge at moment but i dont think that is prob as battery always seemed fine any ideas would be much appreciated
regards garry