Author Topic: anti wet sump valve linked to mag cutout  (Read 1841 times)

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Re: anti wet sump valve linked to mag cutout
« Reply #30 on: 29.10. 2018 15:17 »

 So *????* rocker21 threw the turd in the pan and buggered off....... *conf2*
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
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Offline lawnmowerman

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Re: anti wet sump valve linked to mag cutout
« Reply #31 on: 29.10. 2018 15:41 »
 *lol* *lol* *lol*
1959 A10 SR
1938 Wolseley 14/60
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......and loads of lawnmowers

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Offline RogerSB

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Re: anti wet sump valve linked to mag cutout
« Reply #32 on: 29.10. 2018 17:49 »
To use this type of switch we must also remember that it doesn't relieve the rider of the responsibility to make sure it's switched to the on position before starting and that the earth to the mag cut out is just there as a fail safe in case the rider forgets.  As opposed to the anti wet sumping valve with ball and spring that the rider has no control of and relies on suction from the oil pump. That's why I removed mine - even though it worked fine for the years a previous owner had it fitted.

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Re: anti wet sump valve linked to mag cutout
« Reply #33 on: 29.10. 2018 19:13 »
G'day fellas.
If anyone has an excuse to use a tap it's my plunger. Full oiltank ends up in the sump in only 2 weeks. Then I remember seeing the Notrun Commical rider just up the road with a hole in the crank. The "Oh poo" look on his face when I pointed to the tap.
Cheers
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Offline rocker21

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Re: anti wet sump valve linked to mag cutout
« Reply #34 on: 30.10. 2018 12:25 »
well this has produced a lot of discussion and i am still none the wiser as no one seems to have fitted one, i thought it looked a good idea if fitted in such a way as the electrical connection to earth and the mag was reliable , which should be possible to do. i would be interested to hear from anyone who has fitted one as i am rebuilding my A7ss and hope to finish it this xmas hols and get it on the road for next spring.

Online Greybeard

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Re: anti wet sump valve linked to mag cutout
« Reply #35 on: 30.10. 2018 12:38 »
I don't really have a problem with wet-sumping, especially since I changed the internal anti-syphon valve. If the bike hasn't been used all winter I just let the engine run until it's pumped the oil back into the tank. I am not willing to risk any chance of the oil feed being blocked.

Offline RDfella

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Re: anti wet sump valve linked to mag cutout
« Reply #36 on: 30.10. 2018 13:10 »
Dunno how Greybeard gets away with that. When I ran by GF wet-sumped oil poured out of the breather - not just a trickle - and the smoke was unbelievable. Anything behind became totally invisible.
As my GF is not a daily rider, this wet sumping is a real PITA. Couple of my other bikes do it, but nowhere as bad and, if necessary, can be cleared the Greybeard way. So if I leave the GF for a week or more, it's drain sump time again. And I'm already getting tired of it. But what to do?
The usual ball valve is tempting, and possibly my first choice. An ordinary valve will, one day, be left closed so cannot be considered. But what about this new device? Looks interesting, but I'm troubled by two things. First, the price. Those valves are £1, so I'd be paying over £40 for the mod. To me that's excessive. Also, my mag - as on my other bikes - has a push button stop. Presumably I would then have to change the mag cap to a wired type and run two wires - one to this new valve and one to a horn button type kill switch somewhere else.
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Online Greybeard

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Re: anti wet sump valve linked to mag cutout
« Reply #37 on: 30.10. 2018 13:17 »
Once, after the bike had been left for months, (this was before I changed the internal valve) I forgot about the oil in the sump and topped up the tank. Whoops! What a mess. Black shiny boots!

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Re: anti wet sump valve linked to mag cutout
« Reply #38 on: 30.10. 2018 13:41 »
waterproof boots or fire hazard greybeard? swarfy-- expensive but SRM oil pump stopped my crankcase trying to drink as much as I do *beer*

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Re: anti wet sump valve linked to mag cutout
« Reply #39 on: 30.10. 2018 18:58 »
G'day fellas.
Two things you can do about wet sumping.
Live with it and take 5 minutes before a ride and drain the sump.
Fix it, split motor for new anti siphon valve and new oil pump.
Cheers
'51 A7 plunger, '57 A7SS now A10CR, '76 XT500, '77 AG175 '83 CB1100F, '81 CB900F project.
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Offline kiwipom

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Re: anti wet sump valve linked to mag cutout
« Reply #40 on: 31.10. 2018 03:09 »
Hi guys, every option is fraught with danger , don’t do it is my opinion leave for a long time and drain the sump, cheers
A10.G.Flash(cafe racer)Honda 250 vtr. Yamaha Virago XV920.

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Re: anti wet sump valve linked to mag cutout
« Reply #41 on: 31.10. 2018 03:50 »

  And I'll do my broken record trick and say- yet again- if you *know* you'll leave it long enough to be an issue,  just drain the tank into a bottle, and hang it on the  twist- grip to pour back in when you need it.... too easy ? *conf2*
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Offline worntorn

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Re: anti wet sump valve linked to mag cutout
« Reply #42 on: 31.10. 2018 05:17 »
well this has produced a lot of discussion and i am still none the wiser as no one seems to have fitted one, i thought it looked a good idea if fitted in such a way as the electrical connection to earth and the mag was reliable , which should be possible to do. i would be interested to hear from anyone who has fitted one as i am rebuilding my A7ss and hope to finish it this xmas hols and get it on the road for next spring.

I made up a manual anti-sump valve for my Vincent 1360. That bike has an ignition switch. The key for the switch is locked in the valve until the valve is turned on.
It has worked without a hitch for three years now. Ive wracked my brain but I just don't see a failure point in it. So I just use it and don't worry about all the predictions of imminent doom.
I would first try the various fixes for BSA wet sumping mentioned here. My A10 keeps its oil in the tank for two months with very little drain down. It doesn't need an external anti sump valve, just a startup every couple of months or so.

Glen

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Re: anti wet sump valve linked to mag cutout
« Reply #43 on: 31.10. 2018 08:37 »
I agree with you Glen.
I've got 4 AMC & Notrun twins (all  notoriously prone to wet-sumping) fitted with 10mm heating valves with mag earths, using slight extensions to the operating levers to engage positively with carefully-sited adjacent sprung-blade contacts.
They work fine, I don't worry, and test them now and again by switching them off to stop the engines (with a finger hovering over the usual button or on/off switch - just in case!)
Worth the effort on machines where a frequent sump drain routine could (would probably!) wear out the thread in the crankcase, which is a total swine to sort if it strips. (Notruns can be fitted, like As with modded plates, with incontinence pads with a drain screw in the middle of the massive plug + gauze filter arrangement - but AMCs can't.)

A guy called Andrew Dove also makes these things and has done for ages, but they are much chunkier than the one under discussion and imho not very elegantly put together. About the same price.

Luckily my A doesn't need anything since I sorted the ball & spring inside the cases a few years back.  Hardly lets a drop pass, and didn't need to replace the oil pump - just the wormy drive bits to be on the safe side.

Horses for courses I reckon.
Bill

Offline cyclobutch

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Re: anti wet sump valve linked to mag cutout
« Reply #44 on: 31.10. 2018 09:07 »
Mine doesn't wet sump a drop, even when left for months. Roger at Cake Street put my motor together after I messed up the first time.
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