anti drain valve request

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worntorn, please post the picture of your anti drain valve you mentioned in the "goof-proof" thread. I would like to see how it is done. I realize that the goof proof thread is locked so please use this thread. thanks
 
And it needed locking!


Will do
Photobucket has eaten my photos on an old thread here. I'll see if I can find some others or take new photos.

Glen
 
anti drain valve request
anti drain valve request


Glen's valve.
Valve must be open to remove the key.
I'm sure Glen can explain it better than me.
Pete
 
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. :D

Above 50 f it generally looks like this



Below 50 f it looks this way ( storage)




Glen
 
No doubt I'm going to be hung drawn and quartered for this but this is my experience
About 25 years or so ago I had a mk2a I fitted an on off valve to the oil tank thinking I'll never forget that!!!
But the enevitable happened one morning on my way to work (late as usual) I forgot to turn the oil on,
I got approximately 7 miles before I heard a distinct rattling noise and the bike started to slow up
I instantly turned the oil on and the bike quietened down
I pulled to the side of the road and let it tickover for a bit then rode 3 more miles to work
I'd just caught it in time there was no harm done at all I rode that bike for maybe 2 more years after that,
So when I built my next commando the 750 I still have, I fitted the Rgm velocette valve
I have never had a problem with this for close to 20 years
Whenever I change the oil I always make sure the feed pipe is fully purged and it's been fine
But having read of these valves failing I decided to fit one of the oil pressure sensors that "madass" sells so if the valve was to fail the light would warn me and I could shut the motor down
After all on my mk2a it took 7 miles before it started to nip up
I also think a valve that locks out with a key is a brilliant idea
As I said I expect I'll get hung for this but I couldn't really care less to be honest
 
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.

If you cannot start the bike every 6-8 weeks, then add oil to the tank above the output fitting and let it run. After the engine has run for a while and after shutdown, remove the excess oil from the tank as needed with any number of appropriate tools.
 
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.


Stupid is as stupid does.
 
The younger guy across street from me uses electric grass mower .... he always pulls all the cord behind him to starting position.... then spends afternoon fighting with his cord as he tries to mow back to opposite side of lawn ... eventually he will mow his cord .... there is a better way but I just leave him to it .... maybe when he my age the light will come on but it won’t be me that flips that switch... I do live with anti-drain valve from CNW and could care less what the experts have to say .... different strokes , eh
 
mike you of all people should know there are more issues in the norton oil pump than the end clearance of the pressure side gears to stop/slow down the oil from reaching the sump.there is gear tip to housing,tip to tip and shaft's to housing all can contribute to wet sumping.

wetsumps so badly that it drains all the oil in a few days, FIX the oil pump clearances per the Norton service manual.
 
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. :D

Glen
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.

Thanks for the pics...got my brain thinking now...
 
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