Hmmm, well possibly, but I'd have thought you would have felt that when you checked the head races if they were that worn!!!
I had to ride my neighbours GPZ900R a month or so ago, it was horrid! Anyway, I said to him, the front end has a wobble, he said, "nah, it's a brilliant bike, thats how they are!!".
When I then checked the front end of his bike, I could see a gap between the axle hole and the spacer on the front wheel!!!!!
The wheel WAS loose!!!!!!!!!!
Faults as serious as steering/brakes on a bike need to be investigated properly, not just guessed at!!