Grrrrr! Headset won’t tighten….
Installed new forks last night and it all went pretty well (apart from popping a brake piston out and having to do a bleed). However, there is some play in the headset which I can’t get rid of.
It’s a CK one and the problem appears to be getting the collar which sits into the top bearing race to centre and seat properly. There’s an o-ring inside it which means it’s a pretty tight fit around the steerer tube so it doesn’t move too freely.
The top cap has been done up to the recommended torque, but there’s still a bit of a wobble.
Any suggestions/advice/obvious f**kwit errors?
SCPosted 8 years agoCheeky MonkeyMember
It was cut to exactly the same length as the steerer on the old forks.
Unless the new headset has exactly the same stack height then that might not be as sure-fired as you imagine.
I imagine 2mm clearance would be enough but just for the hell of it whack on an extra spacer and see. Some top caps have bevelled edges / lips on the inside that can foul the steerer as you preload. Bit of a longshot I accept but at least it would rule out one possibility.
Is anything else loose that you’re mistaking for play in the headset? E.g. loose caliper bolt.Posted 8 years agoAndyPaiceMember
2mm spacer is probably not enough. It is suprising how much slack is taken up compressing the headset (after havin it apart it takes a bit of force to get everything seated again) to get the top race seated.
I’ve done this before and thought it was OK with a small amount of steerer showing, but could not stop the play in the headset. Add another 5mm spacer and ignore recomended torque. Just nip it up and try it. If it’s still loose then do it up a bit more (common sense is required here, don’t go pulling on a long allen key use a bit of delicacy).
I usually just tighten the bolt until it starts affecting the steering, then back it off half a turn.Posted 8 years ago
Cheeky Monkey’s advice is sound. Instead of using a star-nut, I bought a steerer plug thing which looks like it is well engineered – 3 knurled facets tighten within the tube and grip it, then you screw the top cap into the inner thread. However it has a 1mm lip which sits on top of the steerer tube and seemed to be fouling the underside of the top cap. I stuck an extra spacer on and it seemed to tighten more BUT all it was doing was pulling the plug out! On inspection the knurled surfaces have some copper slip on them and the inside of the steerer is very smooth so it obviously wasn’t gripping.
I’ll degrease it all tomorrow and try again (or whack a star nut in!)
Thanks guys – I’m pretty sure the problem is solved.Posted 8 years ago
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