Honda-SOHC

We are in the process of correcting wrong information in the Shop Manual Honda CB500-550, where it mentions 49±1,5 mm on p.8. The Haynes manual (CB350-CB500) in Chapter 2. Fuelsystem however says: 40 mm ± 1,5 (§8), at least it does so in the Dutch edition. Now the info in the Honda Shop manual is clearly incorrect. It's either in that fig. 5 or that 49mm. But is Haynes right? Did Haynes knowingly correct the wrong info in the Honda manual or is that '40' a typo? Can any of you look up what the English edition says? Thanks a lot.

What gloves do you guys use to protect your hands when doing maintenance? Vinyl, latex, nitril?

I consider ordering this exhaust bracket from CMSNL: https://www.cmsnl.com/honda-cb500k1-four-european-direct-sales_model14661/brkt-bl-muffler_18430323040/#.XiQImCPvK_g Looking at the number, you'd say it must be original, but the picture shows a bracket that is a bit unlike the OEM I have. The one in the pic is a bit round where my old OEM one is slightly more edgy. Now I'm confident the bracket in the pic will be compatible with the newly reproduced CB500 mufflers, but will it also fit my old OEM exhaust? More in general what is the policy in denoting original parts numbers with aftermarket parts at DS and CMSNL?

A Dutch ad for a change: a CB500K2-ED Candy garnet brown. Admitted - first time - in augustus 1976.
https://www.marktplaats.nl/a/motoren/motoren-oldtimers/m1473983530-honda-cb500-four.html?c=08c285449651fa109c354bbabe740c1b&previousPage=lr
Highest bid sofar: € 3.850,-.

A few days ago I've asked the German site (both the CB500 and CB550 sections) what experience they have with various sealed chains (both O-ring and X- ). I will also ask the French and Italian site. I hope to report more on this in the foreseeable future. Sofar a German CB500 owner claims he has good results with a DID-VX.
I quote him in translation:

... My old chain had a 25mm width which had milled a bit of the casing. The DID-ZVMX has 24,9mm width and would also rub...

Another CB500 owner had reported he has good results with this ZVMX type [explanation Deltarider]

... That's why I went for the DID-VX which has a width of only 23,3mm and this chain runs just free. One can even get a 2/10 feeler gauge in between, when chain is fully pushed towards the casing.

I'd like to add the following remarks.
There could be a difference in clearances between the CB500 and CB550 models and even between the various CB550 models, K and F.
Both the CB500 and CB550 models can develop considerable play at the rear wheel sprocket carrier which may have an effect on the drivechain's trajectory. Please report your findings, positive and negative.

In 1980 I bought my CB500, first registered in 1977. No Owner's Manual under the seat, so I asked Honda The Netherlands if they could send me one. They sent me this one: http://www.honda4fun.com/pdf_libretti/500/CB500_k1/CB500_K1_1.pdf. Although that booklet contained no less than four wiring diagrams, none of them applied to my model; they all showed one fuse where my model had three.
Not until last week - 38 years later - I got the appropiate wiring diagram for the CB500K2 (ED)*. I had informed on the French and the German site before, but it is thanks to the fratelli of the Italian site that I now have it in a readable resolution.
What strikes me, is that the wiring diagram says:
Now the diagram clearly applies to my model: it shows the three fuses and also depicts the not connected and useless LB/W and O/W wires that are in the bucket of my headlamp which the US CB550s used for running lights. Now correct me if I'm wrong, but I always thought that the CB500K2 (ED) model was not imported in the UK. Anyway, if it was and if any of you need the correct wiring diagram, send me a PM. BTW I'm still on the lookout for that model's wiring diagram for the French and the German type to make them happy, although I do not think they will differ much. If any of you happens to have this CB500K2 Owner's Manual:
http://www.honda4fun.com/pdf_libretti/500/CB500_75/libretto500_1.pdf,
http://www.honda4fun.com/pdf_libretti/500/CB500_75/libretto500_2.pdf
http://www.honda4fun.com/pdf_libretti/500/CB500_75/libretto500_3.pdf
the three wiring diagrams are in the last pages and I would be much obliged if someone could scan also the French and German one in a readable resolution. There are some strange things in that Owner's Manual btw, but that's another story.
* It's my believe that this model and also the later CB500K3 served to empty the Honda shelves of leftover 500cc engineblocks.

Has this been answered yet? http://www.sohc.co.uk/index.php/topic,16805.msg142951.html#msg142951
It's about part 17331-323-000, PLATE, AIR CLEANER in Hondaspeak. Mine is missing and I want to use a simple O-ring or whatever. I just wonder what the thickness should be.