Hi Guys,
Well on Friday I removed the beancan from the bike, opened the little port and checked out the weights. Now I have nothing to compare with having never seen them before, but they appeared pretty clean, opened with little force and flicked back fairly well when I let them go. The springs looked pretty good too. Added some light oil to the pivots, cleaned up the case and refitted the bean can. Timing appears OK, so I am borrowing a timing light tomorrow. The bike idled fine and rode like before.
No real clear indication of slow rev loss but it was quite a short ride. I will give a full update of my progress after tomorrow's longer ride.
Once again thanks for all the advice.
Best to all,
Paul