Betcha the battery is just down..go ahead and kick-start the bike and ride around for 1/2 hour and I bet it will be' back on the button' start...or charge it overnight @ 2amps ( no more or it will 'fry' the battery and drastically shorten it's life ). Starter will spin even with a half-dead battery when its free of having to turn-over the motor. Still no button start?, it might be new battery time !!