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Some progress. The noise is down to a gentle rattle now. Things that helped were:
Positioning teeth in the middle of the chain rollers by experimenting with a different width spacer along rear wheel axle. What I originally thought was a perfect chainline was still about 2mm out. This was increasing noise as it moved against the inside plates of the chain.
Backing off the tension of the chain at the tightest point and giving it some slack.
Using a 3/32 sprocket.
Large dose of Finish Line on the inside of the chain rollers.

I also learned about chordal action along the way which turns chain friction at certain speeds into vibration. A higher tooth count on the sprocket (16 to 18) has helped a lot with this. So I don't think it was a single problem, more combination of lots of factors.

Drop looks big between saddle and bars. Unslamming stem might help relieve pressure and solve saddle issues?

Ritte reep?

Masi.

Pedalroom

Nibali's Specialized Shiv

The Izumi Standard Track chain came today and fitting it reduced the noise from the 1Z1 chain. The profile of it seems beefier, thicker plates than 1Z1 and excellent sticky lube was already applied. There was still friction though. Scilly, you were right about this:

The vibration is coming from the "chain suck": as the chain pings off the teeth it vibrates.

Looking close up and moving the pedals slowly I can see the square teeth of the Planet X cog is hanging on to the chain, like it is catching. Then it is dropping off, this (I think) is causing the sound at higher revolutions. I had a play around with shifting chain line around; sitting the wheel on top of the dropouts with the bike upside down. I got the chain line damn-near perfect. The chainring and cog teeth were sat bang in the centre of the chain plates. and still sound, and the chain suck. Conclusion is that it has to be the sprocket, the carbon frame is acting as a loudspeaker to whatever vertical friction is happening there. So now i am looking at getting a sprocket with a more pointy profile to the teeth and a shinier finish. My chainring has pointy teeth and no such chain suck is happening there, so I'm hoping that will solve the problem.

It was around £20 from memory, I had a few things done at once. They aren't the cheapest, of course. I had no clear sign on my forks that they had been in a smash though, so I was a bit more comfortable with sorting them out.

Your pictures show an almost identical situation. I had, 531 forks too. I'd say give it a go, especially if you have the tools. However it is a risk and down to your own peace of mind, for the cost of a set of used 531 forks. For what it is worth, Mercian turned it around with no bother.

I had something very similar repaired by Mercian recently. It was fine. Obviously if you have evidence that it has been in a smash then go over the frame and forks in detail to check for any more serious damage.

Hip Hop Sauvignon Blanc.

By the way, covering the 1Z1 in Finish Line wet lube today did help with the noise, but the vibration is still there so that is only a temporary fix.

Thanks lemonade and lowpug. Funny that, the Halo cog is very similar to the Planet X one:

Just a raw, cnc, thick track sprocket which doesn't get on with the 1Z1. Condor also being a cnc cog. I looked today that...

It looks like the cog is 'holding on' to the chain for too long as it is exiting.

yeah, this was happening at lower speed. It could all be to do with the bushings which are pretty heavy duty on the 1Z1. I have an Izumi chain on order so that may cure it. I also looked at a stainless steel one from KMC - the Z1X Inox because it is supposed to be very quiet. Will post results.

Thanks Scilly. I am going to drop by Mercian in the week for a different reason, I'll see if they can suggest anything. Aside from that I'll also try a few more sprockets too. I think, like you say, it will be a combination of the right sprocket and bedding-in.

Had another play today. Investigated the chainline by adding spacers and swapping nuts around to shift my sprocket 2mm and 5mm across, no difference in sound. I did this video of the noise at a low speed. That is 1Z1 chain and Planet X sprocket. It sounds terrible. The teeth seem to sit dead centre in both sprocket and chainring with a 44mm chainline measured at both points. I'm assuming it is a just bad combination of sprocket, carbon frame and chain at this moment.

It's in the sweet spot. Nice bell.

Nice blog Bill...

http://3.bp.blogspot.com/-dZKi552db-A/UCe-2DKadUI/AAAAAAAARms/oGfbHlanqHo/s1600/$(KGrHqUOKoYE6e2R6+M6BOpElsHn(Q~~60_3.jpg

http://3.bp.blogspot.com/-0CN18Pl5pAc/TriMz_kxcpI/AAAAAAAAKQs/wddW5OiA6Gw/s1600/7a3a_1.jpg

http://4.bp.blogspot.com/-B1P0Fe_HSDI/Tt46fEjP11I/AAAAAAAALE4/eg-iihYk2dE/s1600/230208_213088395379339_109109909110522_705626_662886_n.jpg

http://1.bp.blogspot.com/-1StO67VZypo/TjAeTYOda-I/AAAAAAAAJ2w/cOR1COr1zFI/s1600/1412341503_024c1d7152.jpg

The carbon is definitely amplifying whatever is happening, but there is friction as the chain enters the sprocket. It sort of sits on the cog then drops in. I'm guessing this is causing the up and down 'wobble' as I turn the pedals hard. I'll have to swap out the chainring and see if it makes any difference. It is a Miche Xpress ring currently. On the plus side, the 1Z1 spring clip master link is very useful.

I tried the 3/32 Shimano freewheel with the 1Z1 and the drivechain is still noisy, although admittedly not as much as track cog with 1Z1 chain. I also swapped the rear wheel out and the grinding rattle is still there, no difference. Finally, I decided to swap the 1Z1 chain for a Shimano Nexus NX10 chain and the rattle is still there but not as much as 1Z1. I am just wondering if I have a bad combination of sprockets and chain or perhaps expecting too much for it be silent. It is a carbon frame so maybe that amplifies the rattle?... There seems to be a lot of up/down movement when the chain is in motion, which is odd.

It is a cheapo new SJS sprocket and it is even noisier on a new Planet X sprocket - both 1/8. I have a Shimano SS cog (even though it's 3/32) I'll try tomorrow. The chainring is Miche track but I think the friction seems to come from the sprocket.

the links sat on top of the teeth of the ring until the one o'clock position, when the tension pulled them down.

Thanks Scilly, that is a better way to describe it. It feels like something is grinding, metal-on-metal when I put some effort into the pedals which isn't a nice feeling. It's annoying. I'll try a different sprocket tomorrow.

Wippermann 1Z1 went on my fixed today, new 1/8 chainset, new sprocket, plenty of tension, perfect chainline, and... it's permanently noisy. Looking at the sprocket while spinning the wheel it seems that the rollers don't fall into the sprocket teeth easily. They seem to hover a bit then drop in. This seems to be causing the noise and at some speeds it becomes a vibration. Is it because the chain is new? Do I need a better sprocket? It seems strange because a lot of people have said here that the 1Z1 is quiet.

How many of you actually own a 'show' bike that is more or less not ridden, and something less cool that is the secret everyday bike?

Function has no use for beauty. The desire for aesthetically-pleasing function is a illusion of narcissism that holds no real-world value. The fate of the snob is to become endlessly lost in matryoshka dolls of intricacy, unable to uncover the smallest doll they themselves imagine real. To be a snob is a curse. Beauty exists in the eye of the beholder, it is inconsequential to function. It is this chaotic, shape-shifting characteristic that is, in fact, its wonderful essence.

Aside from Nitto Jags with deep drop bars. They always looks pretty sweet.

a good cause for sure as his last bike was vandalized
beyond economical repair :0(

Bump.

Holdsworth and bits - £280 BIN

Have:
Specialized Toupe 143 saddle in white.
Perfect condition

Trade for:
Similar road saddle in black.
Doesn't have to be a Specialized model.

Thanks.