If you can't laugh at that last post then your humor receptors are failing and you need to get them tuned.
Its from Who Framed Roger Rabit, "dip" is the stuff that is death to all "toons". I guess it is too obscure.
Anti-drainback/wet sump valves... STOP THE INSANITY! It's a fix that can only cause a problem. It cannot FIX anything because nothing is broken. If the bike wetsumps so badly that it drains all the oil in a few days, FIX the oil pump clearances per the Norton service manual. Once that's done, it won't wetsump enough to matter (below the oil tank's output fitting) for at least 6-8 weeks.
wetsumps so badly that it drains all the oil in a few days, FIX the oil pump clearances per the Norton service manual.
Looks like this setup could be straightforward to replicate. When first described I was envisioning some kind of tumbler for the key to lock/unlock the valve. Now I see the key is just bolted to the valve open/close lever and the lever can be pulled off valve so key can then be used in ignition switch.I was just about to post and saw that Pete has got it already.
Here are a couple of photos of the valve on the bike, but with a different key attached ( round key)I feel good that it's dip.
Glen