Originally Posted by drk40
it might also be the brushes in the starter getting too short. in the K-series they're part of the electrical circuit and if they're getting too short they act like a circuit breaker. if it happens again any time soon, put the bike in second gear, give it a good push forward and try to start again. if that tricks works, it's the brushes and you'll soon see some other gremlins showing up with the headlight etc.. happened to my K75 and was a trick I learned on the flyingbrick forum few years ago.
I had brush issues too. I got it going by taking the starter apart and cleaning the carbon off where the brushes ride. I actually found the problem after I just bumped the starter looking for the problem.