Dura ace headset question
just picked up a Cannondale racing bike from a friend, today. I think it is about 10 years old and seems to be in top condition. However,the headset is very peculiar from anything I have experienced before. It seems to lock/click when the wheel is perfectly straight forward. It swings freely in both directions and feels completely smooth otherwise. I am wondering if this particular model had some type of built-in groove on purpose, or do I just happen to have a headset race that has worn. What seems peculiar is that the "locking position" is precisely in the center. Any thoughts or advice you may have on this would be greatly appreciated. My only frame of reference is a 20-year-old Italian racing bike with Shimano 600 that has now become a favorite with my teenage boys.