I have recently changed the front tyre on my old bike (cbr600Fx). I noticed the old tyre was worn to one side, I checked the bearings when I was changing it and they seemed fine, I am thinking it could be suspension is unbalanced, maybe the wheel is unbalanced, or the forks need bleeding, any other issues it could be?
It's perfectly normal for a motorcycle front tire to be worn on one side more than the other. The explanation is simple, you travel a much greater distance when you turn LEFT in places where vehicles drive on the RIGHT or vice versa depending on which side of the road you normally drive on.
Here is a link to an explanation:
Scroll down to the section that is titled:
My front tire often wears more on the left side than the right. Is this an indication of a problem with my bike?
There is an image there that shows what's going on.