So the test ride went absolutely superb, checked the oil along the way both return and level spot on,
Came back checked again spot on put the commando away on tdc as you do,
Get up the next morning to check over everything pop the filler cap off an she had wet sumped the majority from tank to the sump,
Then discovered a substantial amount of oil in the timing cover which accounted for the rest of it
So it’s been leaking via gravity overnight from the engine case oil way drilling shown in picture one into thin air in the timing cover as nothing matches up with it, filling up to the higher engine case drains into the sump, the first 68 engines didn’t have a lowered timing case drains into.
Bit of checking over and reading Norman Whites book and there as an interesting reference to Norton flying engineers out to California in 1968 as the earliest bikes were having issues with it,
So I think I’ve re followed in the Norton engineers footsteps, that flew out to America,
Interestingly Steve Wilson’s ’s book Norton Motorcycles also mentions a reference to the first 100 bikes being fitted with the Atlas cylinder head on the production line which was then promptly discovered in the factory and replaced with the correct Cylinder head,
Love uncovering history,
So I’m thinking the best course of action is to get a 25186 ab1 later 1968 Norton Commando timing cover so the over pressure venting matches up to the case so the pumps not leaking into thin air in the timing cover,
She’s one of the first 65 ever made so could make sense that she had the current timing cover on from new,
Gonna check with a few people tomorrow but it’s pretty obvious that’s it, no way it would drain past the brand new pump that quick no leaks from the back of the pump.
A few tests show it’s coming from there

an with the measurement there’s nothing blocking it, from what I’ve read on later commandos they actually threaded that oil way drilling so when working on the timing chest oil wouldn’t leak out via gravity, thought you all might find it interesting especially anyone else restoring a 68’