Honda-SOHC

I see what you mean about grotty - I would be minded to try as you said with the new m/cylinder in place.
If you do a search on here from the search box at the top there are other ways to force out the piston involving a grease gun.

Are you talking about fitting washer at the top mount for alignment or the lower fitting where it clamps to the swing arm?
I had to do some spacing at the top using some washers a member (allankelly1) made for me in SS.

The caps just screw into the HT leads if you have the Caps with a screw in fitting like the originals. this link is for the ones I purchased just realised you are looking at the same item.

https://www.ebay.co.uk/itm/151925589049

Theses were mine plenty of HT length so you can fit them easily, looks like the same supplier except the name Hendler no longer shown.
.

This is what threw me, mine are working ok so only if they leak or fail will I change them for more genuine looking ones. This seller specifies 317 mm pin/fork as opposed to 315 mm for the more original looking ones.

.https://www.ebay.co.uk/itm/275844433087?fits=UKM_StreetName%3AFour&itmmeta=01HVGP17D1CN3MB03G6B6546FJ&hash=item40399c04bf:g:ZUoAAOSwkvtkXJoO&itmprp=enc%3AAQAJAAAAwI8alBB5aPkypPrejQhPPYx2HB3euIn3HXBvSGg%2FHoqBb3qeM4rniE8CvSg7G9Gc2giGRImdRDuHfVmJ8QoqoH5pHkX3eGXHdFMQFse9MaV7nc%2B%2FhF0bi8FzgJkINdAP1Ueq7bITmRUHDNlKCR%2FVYNu6o3xjnJiJOuINILssmwGMUWkoZR9XBZTa9tjp4aZYYRpoVFhAOn%2BPmtDiaI7HQP9cQZEjoqN%2Ba2LsMog0ZV88xjKASrEqLTH8U2YPthrcaA%3D%3D%7Ctkp%3ABk9SR8z2hJbcYw

I tried to buy some parts for a Nissan r3mR from a seller in the USA they were about $50 but carriage was about $150 extra so I found some elswhere.

Quote from: McCabe-Thiele (Ted) on April 15, 2024, 10:19:58 AM

Is that a genuine 400 rear damper you have found?

No, they are from Legend Motorcycles. Nice price too currently at £58.45 can't really lose! 
 https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2334524.m570.l1313&_nkw=cb400+four+shocks&_sacat=10063&_odkw=cb400+four&_osacat=10063

My shockers have a chromed shield on the top section - not sure if they are original or have been replaced in the past mine is a 1978(S) plated version.

Is that a genuine 400 rear damper you have found?

If you loosen the right bar switch clamp you should be able see the various wires inside the switch and work out if the starter  button is a simple earth or if it sends power to the solenoid when depressed.