I have Vitus 979 fitted with a Shimano 600 HP-6400 headset, and have been fighting a loose headset for some time now. The problem is that once you tighten the headset top cup and locknut until it is tight enough to have no hand-on-brake-rock-back-and-forth play in it, then its too tight and is notchy and horrible to ride. There's none of the 'middle ground' between too tight and too loose that all the how-to guides say there normally is.
So I had a look and have found that the bottom cup has a hairline crack in it. I think this is more a consequence rather the the root cause, although doesn't help. I also found the bottom cup is loose in the headtube!! And in doing a little research, gather that the headset could be the wrong type, being JIS instead of ISO.
Can anyone suggest what I need to do to fix this? I presume a new headset, but If I have the wrong type I want to know what is good to replace it with.
Thanks.
So I had a look and have found that the bottom cup has a hairline crack in it. I think this is more a consequence rather the the root cause, although doesn't help. I also found the bottom cup is loose in the headtube!! And in doing a little research, gather that the headset could be the wrong type, being JIS instead of ISO.
Can anyone suggest what I need to do to fix this? I presume a new headset, but If I have the wrong type I want to know what is good to replace it with.
Thanks.