This was the cam I removed from the Moto Guzzi, they can wear on one lobe but this one was good.
How much torque ( DPO with a rattle gun ?) does it take to split a M16 thread on a steel cam.
I was lucky enough to find a NOS cam in the USA with the revised oil feeds.
I finally got around to lifting the 850 (or most of it) off the work bench (not work table)
Of course when I rolled the crane up to it the legs hit the bench and the end of the jib was a long way from the bike.
Happy to say with some inventive rigging and shimmying the bulk out toward the jib on a piece of 140 x 19 hardwood decking timber at the two bench corners got it done and it is safely on the ground ready for its wheels again.
That was only the beginning, a multi decade Moto Guzzi mechanic had not seen a set of final drive gears this bad.
New one's were only $799.
How about running the chrome bore until the rings make a groove in the alloy of the cylinder at TDC.
Get lemons, make lemonade, all it took was a 1000 hours or so, overtime and $20k (no paint or chrome)
Once you go through old bikes they are fine, Norton's are no different, if they are not reliable, the reason why is in the closest mirror.