Honda-SOHC

Just reading this whole thread. The Fowlers listing is in 1/10s of a mm! And is 4.9 x 2.5m so still far too big:
https://www.ebay.co.uk/p/1815886647

I have found that nitrile O rings on the main jets actually just expand a bit with E5 and seal better. Have seen no deterioration apart from that over the years.
Just to add to the confusion I thought the Honda size was 3.5 X 1.2mm but never found them listed as a separate part for the 500 as they came with the main jet:
https://www.davidsilverspares.co.uk/CB550K0-1974-USA/part_5119

But I have used 3.5 x 1.2mm, 4.0 x 1.2mm (which I think HM recommended some time ago)

I use E5 80% of the time and have have thrown E10 is sometimes when topping up and found it OK. If storing for a period only E5.
But don't break up the happy home. I find it's always best to put your argument once and disagree, but don't prolong it and hijack the thread....which I have done.

Head back on and cam on and timed. Just that bit of manipulation of the tensioner gave me that little bit more and needed virtually no leverage. Re-used the gasket so we'll see. I agree Oddjob the snug fit of the chain on the sprocket gives a more positive fit and I think it will be quieter.

Definitely sitting on both upper and lower sprockets correctly and I have "timed" the cam position. Rotates smoothly off the kickstart and keeps position.
Double checked the forward slipper and checked its upper and lower location in the crankcase and block. May check for a third time. Have done this operation OK maybe 10 times in the past. I know its inside the chain as I rest the chain on it. as it stops it falling in before you put the head on.

Watched some of it. The 500's celebrity status didn't count for much. Looks sound but aged, like many of us. Nice to see it's still wearing its original mirrors and it does look like a new paint job. Looks like the rocker cover has been disturbed and I wonder what else in its 53/54 years.
If the normal auction charges apply to the sale of that 750K0 then they will only get just over £9400. That's a 45% loss on the £17k

Good to see you are home Ted. Trying not to overdo it at home must be difficult.
Phil

Is that the upper or lower mounting?
Not that its any use I had an awful job removing the upper bolt on me F and had to saw it off to get the engine out of the frame. Tried whacking t, soaking, heating to get the remainder out. Had to drill out one side before it shifted.

Yes it's a major disadvantage of maintaining the 750s.
You must be very satisfied.
And only the owner will ever know.

I had a late US K3 that had pd46B carbs but never noted down the pilot jet, but I have a chart on the carbs of all the 500/550s that I downloaded from either this site or the US one and that states a 42 as standard.
But you are right that the manual states a 38 and strangely a 42 for the 500K3 that I think was sold in Europe. But Honda manuals do have quite a few mistakes.
I wouldn't worry.