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Old 01-14-09 | 06:34 AM
  #42  
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From: Ann Arbor, MI

Bikes: 1980 Masi, 1984 Mondonico, 1984 Trek 610, 1980 Woodrup Giro, 2005 Mondonico Futura Leggera ELOS, 1967 PX10E, 1971 Peugeot UO-8

Originally Posted by europa
Bloody bicycles.

I pulled the headset apart last night (didn't remove the bearings, just dropped the fork - mistake?). Greased everything. Tried to convince myself that the thing was adjusted properly. Did everything up.

One thing I noticed which I hadn't before. Under the top bearing dust cap (?) there's a plastic bush that presses down on top of the bearing. This has a break in it. It's a clean break, it's a tight fit around the steerer tube and the break expands slightly when it's pressed onto the steerer so I suspect it's supposed to be there, but don't remember it. It's a Ritchey headset. Can anyone confirm that this break is supposed to be there? Does it matter where that break sits (front, back, one side). The headset all looks right, I'm just feeling panicy looking for problems to fix.

Ride to work this morning?

Still clicking but the noise has changed - it's softer, muted almost, but still there. I'm wondering if it's worth just pulling the top bolt down a quarter turn at lunch time (after loosening the neck of course, then resetting it, then finding it's not central, then resetting it).

I've also looked closely at the cables, particularly the gear cable outers from the bars to the frame which have been the source of clicks in the past. Last weekend, before all this this noise went beserk on me, I shortened them (the set up changes had left them too long) and replaced the end bits on the outers with plastic ones rather than the metal I'd been using - I really don't think it's the cable ends. One gear cable now touches the front brake cable but again, looking at it when riding I don't think that's the problem either. Unless it's the rear dr cable outer at the back end of the bike ... I haven't looked at that and it was disturbed while doing the cables on the weekend so another job for lunchtime.

If tightening the headstem doesn't work, I'll swap the pedals tonight - easy to do, just steal them from the Europa
Listening to the noise this morning, it's really easy to believe it's pedals ... which guarantees it's something else doesn't it.

I must be in a good mood today, I'm almost enjoying this now.

Richard
Chances are this is a dust seal, and is not critical. It should not be allowed to affect how freely the headset rotates, so you can feel the correct adjustment point. The headset should be adjusted just tight enough that there is no play under real-world stresses, but also no binding or sluggishness all 'round the circle. Any tighter is really too tight. A quarter-turn might be too much.

Steel bikes conduct sound from any point to any other point, except perhaps across the headset bearing. The fact that while riding it sounds like a pedal does not mean it's caused by a pedal. It also doesn't mean it's NOT caused by a pedal.

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