Hello Tim,
Thanx for your input! The thing is that I already addressed the ball in the oil pump during rebuild so I’m quite sure that’s not the issue really. Or maybe it is? Who knows.
Lot to be said about the anti wet dumping valve, and I previously stated that I would rather fix the original problem than adding another part that may or may not cause problems in itself.
Thing is like I said before that if I was to ride the bike on a daily basis this would probably not be an issue at all. But I don’t...
Whole thing bothers me a bit since my Triumph Bonneville is totally free from wet dumping however long I leave it without fireing it up.
/simon
email (option): SimonofSweden
Did what Ron recommended tonight and took the spring and ball-valve apart.
I tried to inspect the ball visually to see if there was any damage to it but it was hard to tell with all the refections in the shiny metal and so on. So I decided to inspect it with the most sensitive part of my body (no not that one!), I put it in my mouth and sure enough I could feel some ridges and irregularities on it.
I'll be ordering a new one (and a spring) first thing in the morning.
good night,
sim00n
As mentioned before, the wear will mostly be inside, at the aluminium seat, and on the spring. The ball itself is hardened steel. While ordering, would be good to also order the check valve inside the oil pump (also a ball and a spring).
I remember using a brass rod and hitting the steel ball quiet hard into its seat, then making sure it will fall out again, to know that it is not stucked inside.
email (option): michaelsteinmann@gmail.com
Triumphs if it is an early one have a different pump to BSA's.
As Ian says, Triumph's have a piston pump so less likely for the oil to get past unless well worn. The oil just runs around or through our gear pumps.
Tim W
email (option): t.j.walker@btinternet.com
Yes very different indeed.
I have built them both from crank to handlebars and tail lights so I am fairly aware of their construction. But no way for you all to know what I know about my bikes of course! :D
Appreciate all input.
Best regards,
Simon
email (option): SimonofSweden
Just run them on the straight grade they were designed for. I've put Morris straight 50 in both my 16H and M21 and both have stopped wet sumping. I can't see any point putting expensive oils in these bikes as any side valve barrel with all the gubbins on one side is likely to distort and thus burn oil. The Beezer was rebuilt by Rick Partington and the Norton at a field station in 1945. Not been apart since save for the magdyno
email (option): jeremy@clogmaker.co.uk
/simon
Monograde oil certainly isn't a cure in most cases...Ian
email (option): ian@wright52.plus.com
I use a valve on my 16H and ES2 with no problems at all. Easy to check the oil indicator when started on the 16H but make sure you get the right type of valve. I was talking to a bloke who fitted a breather type valve with a rubber flap and it didn't work. The one I use is from an eBay seller "bikerbsa", his valve screwed straight into my crankcase so was as near as possible to the pump and you can't see it.
https://www.ebay.co.uk/itm/BSA-CLASSIC-BIKES-ANTI-WET-SUMPING-VALVE-IN-STAINLESS/392098528193?hash=item5b4ae4bbc1:g:~eMAAMXQU6tQ~u0Y
email (option): horror@blueyonder.co.uk
Horror,
Those are the type i have fitted to my M33 and the 16H, both screwed direct into the crankcase. been there for around 4 years and never been a problem. I cannot see a reduced flow but have not measured it to see if it has. I will sort the BSA pump out the next time i have it in bits, but i don't think you can do anything with a 16H unless you buy a new pump, so the valve will stay on that one.
Tim W
email (option): t.j.walker@btinternet.com
I've had the one sold by bikerbsa (Polly Palmer) for 15 years without problems. As Polly is ex president of BSAOC and current active member he's unlikely to sell dodgy BSA stuff.
There is no single best solution for wet sumping. It depends on a number of factors, best illustrated by some examples:
Case 1: You have a large family, a full time job, a number of other hobbies, own a number of motorcycles, spend a limited amount of time in your workshop and only ride your BSA occasionally. Your best bet to avoid wet sumping is to drain the oil each time after your occasional ride.
Case 2: You have a small family, are retired, love tinkering in your workshop, only own a few motorcycles and ride frequently. You have already fixed your anti-wet sumping valve and you advise everyone else that this is the only solution.
The truth is somewhere between these two extremes. I have 6 motorcycles and 2 of them have dry sumps. I have fitted a small ball valve in the pump suction line on each. One can of course forget to open the valve and for this reason, I would not recommend it to everyone. It works for me though.
:smiley:
email (option): pvlietstra at gmail
I think you have some good points there Peter.
As for fitting a manual valve to the oil feed to keep the bike from wet sumping:
Have I ever driven off forgetting to turn on the fuel tap? Yes I have.
Have I ever tried to drive away with a lock in the wheel? Yes I have.
Will I sooner or later forget to turn on the oil before riding off? I most certainly will!
That's just me.
/simon
You're a braver man than me, or you have a better memory. Have you ever ridden off and forgotten to turn on the petrol..? If yes then you can just as easily do it with the oil tap. The problems I've heard about with anti wet dumping valves have either been down to plastic or poor quality valves breaking or user error like wrong type of valve fitted and no way the pump will open it. I can open my valve with a light suck, if you can't, it's the wrong valve. Also Velocette fitted them as standard on the oil tank, so further away than I fit them, and I've never heard of a Velo seizing up because of one.
email (option): horror@blueyonder.co.uk
Beat me to it Simon 😀
email (option): horror@blueyonder.co.uk
I have tried any and all remedies to cure the wet sumping on my M21. The problem is I have over 30 bikes and can't ride them all. Also where I live it can get hot in the summer (111 degrees a week ago) which makes the wet sumping worse. My Norton Commando will also empty the oil tank in the summer. The only old bike I have which does not do this in my Velocette which has from the factory a check valve in the oil line.
I finally this year fitted a shut off valve to the M21 which has cured the problem. Yes I know I could forget to turn on the oil but am not worried as on all my old bikes they get a full inspection before starting and any time I stop for fuel, food or beer. I always check to see if oil is going in to the motor and returning to the tank before the bike moves.
I must be lucky then. I'd certainly never ever put on an off valve.
email (option): jeremy@clogmaker.co.uk