www.b50.org

Canberra

We used 304 as an industrial grade stainless in making rail wagons, rail cars and passenger wagons. Beat, are you going to stress relieve the frame/welds by any means after construction? Like 316 it can work harden, so I'd be on lookout for cracks. Not normally used in motorcycle frames so it'll be ...

Canberra

Thanks Gerry, interesting to know. It seems there is a national design rule in Oz - Vehicle Standard (Australian Design Rule 86/00 – Parking Lamps) 2016 that applies to all vehicles. All I can find on use is they are "advisory" if you are parked at night in middle of nowhere, which seems practical. ...

Canberra

Does anybody use a parking light? Is it a legal requirement?

Canberra

Interesting Shannon's insurance didn't bat an eyelid insuring my B50SS with a big bore kit and disc front brake. The B50SS has been road registered for many years and I believe even with changes I should be able to get a concession plate and I note my changes would have been within 10 years using st...

Canberra

Baz, You say between the barrel and crankcase? There is an oil drain through the barrel and ends up between the sleeve and crankcase. Not sure of the dowel you looking at - what part number on the drawing? There is a locating dowel for the alignment of the crankcases (40-0394 on 72 parts book and 67...

Canberra

Hi Baz, I have a B50SS and T and neither have a dowel or seal. The only seal being the base gasket on the joint. If it leaked there I would have thought of an O-ring but it has never been necessary. It would be easy to fit an o-ring in the spacer from later engines. Plenty of other areas in the engi...

Canberra

One really good bonus when you fit a later fork with disc is that you have rubber mounting for the handlebar. I have one from a '79 model and there was very little weight difference as the conical hub is so heavy. It cuts out a lot of vibrations from a big single. Brake is set and forget with no iss...

Canberra

I just noticed this https://www.tributearchive.com/obituari ... n-Services.

John

Canberra

<135 Welcome - Yes, we are all still learning :smile: In terms of how many revs you can really get with these engines search the site on our recently departed Stan Millard posts. All his engines breathed and rev'd incredibly high although he was a genius at radical restructuring of the heads. The 25...

Canberra

The world has lost a vast knowledge bank and is poorer for it. Stan was a character and will be sorely missed by all from Oz and New Zealand who knew him. RIP.

John and Lynn from Canberra.

Canberra

Do the later taps (which appear to be more substantial) fit on a 3 gallon tank? Bearing in mind the taps on the larger tank is a bit close to the side covers.

Canberra

If the metal plates are flat although undersized consider adding more plates. Have you any damage to the grooves in the clutch center. They have to be smooth or they will hold up the movement of the plates causing clutch slip.

Canberra

I believe B50 and B44 were same and the plug has a shouldered head about 1/4 inch thick with a slot for tightening. Usually the head is center punched in two places to tighten it into the counter-bore in the flywheel. I don't have one out to measure the thread but it was a coarse thread. They tighte...

Canberra

Thanks Beat. I found a couple of old original taps which were broken at lever. I notice the metal was distinctly better than what is being sold now as replacement parts and body was a lot thicker in section. Does anyone know if they the same as used on Commandos with 1/4 NT threads in early 70s? I s...

Canberra

I'm beginning to think that there are various quality available on the market. I use thread tape on my taps and it is very difficult to tighten the nut and sealing washers without the tap turning. This means holding the body of the tap when the material is rather prone to deformation damage. I figur...

Canberra

The main problem is the thread into the tank and material used on the taps makes it impossible to tighten the tap securely without it fracturing. The tap body is so soft it easily deforms if you try to hold it whilst tightening and this can cause the seal to fail and hinder the taps rotation. They r...

Canberra

After shearing <218 <218 yet another tank tap made from high quality butter on my 3 gallon B50SS tank I am wondering has anyone found good replacement fuel taps <201 <201 to fit the tank without re-tapping the threads that can mate up with the standard hose fittings :?: Good quality brass would be p...

Canberra

I've been running with the lower clearances as per eebtr7 for great many years. From what I can see lower clearance may give longer valve timing but by small margin and it would depend if the cam is worn anyway so in effect would act as a re-adjustment. The old sit on TDC on firing was included in s...

Canberra

Oh,to be young again (and foolish). Great story, although sad for the nether regions.

Canberra

Very neat
John

Canberra

Hi Beat,
Lynn and I wish you all the best. It'll take time to get strength back so don't over do things without a brace for a while - take it slowly.
John

Canberra

So that's where I have been going wrong all these years

Brilliant

John

Canberra

My CCM rocker box came with capped hole. I just pushed out the cap and the bored hole came with the recess for the o-ring. One day I'll get around to bushing it. That o-ring works until you get a bit of wear in the aluminium's bore then the dreaded oil leaks come. Even replacing o-rings does not wor...

Canberra

I remember that one Jeff. The 10-32 is 60 degree, similar size and works well as a bodge for worn threads. Slightly less TPI but wouldn't be noticed on a standard 2BA nut. Although I doubt if you'd find a deep thread to be tightened into before it becomes a bind. I remember when I worked in a metrol...

Canberra

Knowing BSA it was a way of getting rid of 20 inch stock on hand. Not sure which other BSA models came out with 20 inch. Nothing mentioned on the website but are the tyres road rated?

John

Canberra

Thank you very much Jerry T. Your timing was excellent. Leightons just refurbished a B50H seat for me and they made a foam using yours as a guide. Apparently your seat had a one piece foam as designed specifically for the B50H. I have only seen foams which were cut down longer B50SS versions to suit...

Canberra

Happy Birthday and don't let those germs get by. Have one (or two) glasses of scrumpy from Lynn and I.

Regards again from bottom of the world (or the top whichever way is up).

Canberra

No 2 - same. Must be starting technique or state of ignition coil.

Canberra

Why not have a word with your local exhaust shop? I got one in Canberra to hand build mine which is a lot more complicated that what you are looking for and it is 1 3/4 OD. It needed a few extra bends to bring it under the frame and out of the way of the kick start which is still a standard part. I ...

Canberra

Hopefully we can all escape lock-down and get some warmth. I ended up respraying the bike and doing some work on other parts. I used a Ford paint which I thought I could get everywhere years ago. Tango was nice but only ever used on 69 x V8 race bred XB falcons so have to get it specifically mixed a...

Canberra

Could it be the original hepolite piston had a long skirt. Maybe they needed the liner to be at a sufficient length but the con rod and bottom of the liner proved a conflict. That created the need for the cut outs on the lower sleeve. With modern short skirt pistons maybe the liner could be shorter ...

Canberra

Hi Skippy, I see a little birthday cake against your recent posts. Hope all is well and you get a chance to get out for a drink (alcoholic or not) to celebrate.

Happy returns, Regards, John

Canberra

There are a range of electronic ignitions on the market nowadays and we all have preferences and comments on them. Boyer had to upgrade their units as the earlier ones was severely affected by even a small battery drop. Pazon which I am using recommend replacing most original ignition components alt...

Canberra

How is the battery? I've had the misfortune of running a Boyer with the battery on it's way out. I had huge problems starting until I replaced the battery. I use a different electronic system now which is less prone to voltage drop.

John

Canberra

On the B50 there are two designs for the valve mechanism. The later is spring loaded to release the valve lifter. I changed mine many years ago so am unsure of the parts involved. I agree with Momus. Welding may bring up more issues with heat treatment than you're trying to cure. I believe Stan did ...

Canberra

I find it'll come down to what you want yourself. Original type patterns, albeit with better compound material, or go for a more modern sportier tyre. I have fitted Metzlers on mine at moment and they seem OK although I do normally prefer Avons. It came down to price as I find the B50 is rather hung...

Canberra

Jerry,

Does the large tank have a brace underneath going from one half of the saddle to the other? If so, it would be later version which would be worth selling. These larger tanks (with or without the brace) are as rare as the short seats that went with them.

John

Canberra

Being a short arse no wonder the seat on my B50SS feels as high if not higher than the B50T I have

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This is a warning to anyone considering making a fibreglass version of the seat base

John

Canberra

Jerry,

Same dimension as mine 305 mm, so no issue with the mount. Mine also is forward in relation to the tank.

Let me know what you decide on use of tank/seat and will pm JB.

Canberra

Hi John and Jerry, My pan is so damaged if Jerry goes down the 2 gallon tank route I would be interested in your pan John. I would just need new good foam and cover to suit, which Leightons can make to suit . Attached shows the bodge from BSA for reducing the foam length. I would be interested if an...

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