Got some new clutch plates...
Looks like I need a new basket too. Luckily I found a NOS Matika basket in the UK, it's in route.
In happier news, I found the elusive RH power valve, NOS:
Shiny happy parts
I opted out on the Lucus assembly lube and instead went with premix (Klotz R-50)
Dry run of powervalve assembly
Everything lined up
An almost brand new top end:
Holding off on an o-ring for the main exhaust bushing, then I can oil up and assemble for good.