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British Bikes / Re: My 1951 G2 Trials
« Last post by murdo on October 13, 2026, 09:55:00 PM »
Quote from: Vreagh on October 13, 2026, 10:59:14 AM
Have you checked the pressure relief valve in the crankcase ?
Yes as described above, the ball is seated correctly and can feel it relieve the pressure when pumping hard with oil can. The oil feed to the rockers is showing no sign of any oil at the crankcase fitting.
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British Bikes / Re: My 1951 G2 Trials
« Last post by Vreagh on October 13, 2026, 10:59:14 AM »
I think he's referring to the rockers feed which of course are plain bearings. Have you checked the pressure relief valve in the crankcase ?
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British Bikes / Re: My 1951 G2 Trials
« Last post by Rex on October 13, 2026, 09:13:01 AM »
if the pumps are present and pumping and the oil drillings are clear what's the issue? I've always been surprised at the simplicity of Enfield pumps and oil systems, so maybe you're looking into it too deeply?
They're ball/roller bearings so run on a smear of oil at no pressure.
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British Bikes / Re: My 1951 G2 Trials
« Last post by murdo on October 13, 2026, 07:46:17 AM »
Things havent progressed much while I have been in hospital but I am able to do small things that dont involve lifting ok. Today I filled the oil tank and spun the engine over with battery drill (no cylinder head on yet) to get oil pressure up. I have good flow to the crank and return to tank, but cannot get any oil from the fitting that the cylinder head pipe attaches to.
For those not familiar with Royal Enfields, the head oil supply comes from the scavange pump side and is pushed through the timing case to passages in the crankcase and up to the head through an external pipe.
Today I took the timing cover off and rechecked all the passages and that the relief valve was seated correctly. Using an oil can was able to push oil through all the passages and could feel the relief valve open when pumping hard with the oil can. By turning the oil pump shaft by hand was able to get oil flowing, so I know that the pumps are working fine.
Could the problem be that the drill is not turning the engine (and therefore pumps) fast enough to get the oil to flow?
I hope some of you wiser gentlemen may be able to suggest where I can go from here as I have no wish to start the engine with no oil flow.
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British Bikes / Re: Australian-made motorcycles in the 1950s - help please
« Last post by R on October 07, 2026, 11:29:02 AM »
My little Waratah spent its entire life on a farm, going to check on the cattle every morning.

When it was about worn out, it was replaced - by a CL175. Circa 1971 I think.
I bought it at the farm clearing sale, one owner, never been off the farm.
It still ran, but the teeth were nearly entirely worn off the gearbox sprocket.
And the big end talked to you
Probably never had a penny spent on it ...
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British Bikes / Re: Australian-made motorcycles in the 1950s - help please
« Last post by 33d6 on October 07, 2026, 05:00:26 AM »
Given Rupanyup is in the middle of nowhere and too far away from anywhere to be in actual riding distance by Malvern Star I wouldn't be surprised if it was bought but never registered and never got outside Rupanyup. Is the place even big enough to rate its own cop shop to keep an eye out for such blatant lawlessness as an unregistered autocycle?  It would be hard to think of a more impractical motor vehicle for the area. Perhaps it was just used to come in from the farm to collect the mail or some such. I suspect the novelty quickly wore off and the wee beast spent most of its life sitting in a shed.
Go back and ask. Leon.
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British Bikes / Re: Australian-made motorcycles in the 1950s - help please
« Last post by R on October 07, 2026, 12:06:55 AM »
Quote from: cardan on October 06, 2026, 10:39:14 AM

Worth repeating something from above: the frame is fully gas welded (no lugs) at the Malvern Star factory, which was a modern process for 1948.

Aye - my similar era Waratah 125cc is the same - all welded frame, no lugs.

Quite a substantial weld around the steering head too, no lug there either.
Without sandblasting it and studying it closely.

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British Bikes / Re: Australian-made motorcycles in the 1950s - help please
« Last post by cardan on October 06, 2026, 10:39:14 AM »
Oh bummer. Why is the one you're looking for always missing? It's said that the bike was bought new for use in Rupanyup, but even though it's way out in the sticks you'd think it would have been registered when new. Maybe communication between Melbourne and Rupanyup was a bit flakey. Thanks for looking!

By the way, I missed the "S" at the start of the engine number - looking more closely I see it tangled up with the "No".

Yes, R, it would benefit from a wipe over. Or better still, an occasional spin around the car park. The Auto-byke is not much of a motorcycle, but this one is a very nice example. Worth repeating something from above: the frame is fully gas welded (no lugs) at the Malvern Star factory, which was a modern process for 1948.

Leon
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British Bikes / Re: Australian-made motorcycles in the 1950s - help please
« Last post by 33d6 on October 06, 2026, 08:20:38 AM »
Interesting. S586/15553 and S586/15555 are listed, both first registered mid 1949 but no S586/15554. There are little gaps like this all throughout the list, remember that this is only the Victorian records. I've no idea how many were sold in other States.
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British Bikes / Re: Australian-made motorcycles in the 1950s - help please
« Last post by R on October 05, 2026, 09:06:12 PM »
That bike could be greatly improved by dabbing on some phosphoric or citric acid ?.
And careful rinse off and then a light wipeover with linseed oil.
(gently removes the bulk of the rust, and puts a shine back in original paint)

Or even just a wipeover with an oily rag.
But that precludes any future gentle rust removal.

I know some folk like the rusty crusty look, but when it has sooo much potential as an original paint bike ...  ???
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