Been working on the latest project. It’s a Spada with 49,000ks. It runs beautifully, instant pickup, no obvious issues or untoward sounds or noises. I’ve rebuilt the carburettors, removed and cleaned the cam chain tensioners and checked, then re checked the valve clearances, At idle and up to around 2500 rpm it has a fairly audible rattle that I first suspected to be valves. I’m a bit stuck at this point. I’v acquires the tools to replace the cam chains but am becoming less and less certain this will solve the problem. Is it possible to get to the bottom end on these guys through the sump like I can on the mighty moto guzzis?