if you do strip it down and have the sludge trap cleaned, the flywheel bolt that also secures the sludge trap really should be replaced with a new one , how I know this?
My local engineering firm, cleanede when I had the timing side bush replaced,? well they did not replace the bolt and after 50 years the bolt decided to strip the threads in the flywheel then drop down into the sump chamber, whilst I was riding up the M4 at 70mph and smashed both crankcase halfs, srm had the bolt in stock and a week later and £350+ lighter Steve Mcfarlane had repaired both crankcases and restored the crankshaft and the bike is still running, that was about 18 months ago