www.b50.org

SteveS

Hi Baz,

The kickstart ratchet nut 76-0271 according to a listing off the internet is 1/2" BSC 20tpi

The clutch centre retaining nut 40-3227 is shown in the BSA parts list as 1/2" BSC

So both cycle threads

SteveS

Hi Jeff Thanks for the details on the Loctite Form-A-Thread. I was not aware of the product. Seems simple enough DIrections: Coat bolt with release agent Dispense and mix equal quantities of compounds on clean surface Apply into application Screw bolt into place Wait 5 minutes and remove bolt Allow ...

SteveS

. Hi The previous owner of my WDB40 fitted a Fleetstar petrol tank that accommodates a tank rack. I liked the idea of a rack so I dug out the four locating holes as they were full of filler. I than ran a 1/4" bsc (cycle) tap down the holes. Three of the holes are fine but one has no thread left at ...

SteveS

Hi All I guess a welder that knows what they are doing could weld the aluminium brake cylinder directly to the back of the brake plate. Assuming there was no distortion in the cylinder caused by the welding process it would make the front face look a little neater as there would be no need for the s...

SteveS

Hi Gerry

Not sure what P51 and P52 are as there are only drawings of footrest and kickstart. P50 is the A70 twin so P51, P52 could be derivatives.

I also think all the ETED drawings are various versions of the 350 twin that became the Fury / Bandit

SteveS

Hi eebtr7 I understand your username a bit better now re: TR7, as kid my late Father had a TR2, much fun was had :razz: What has been known for a while and has now been further detailed in print (*) i.e. the brake plate on your B50SS was originally designed to accommodate a hydraulic brake set-up i....

SteveS

I recently purchased a copy of 'Thunderbolts & Lightning - Vol I - The Road Bikes' by Peter Crawford as I run a brace of A65's as well as B50's. It's a very well put together book with many contributions from the people who worked at BSA at the time. I've found it a great accompaniment to Brad Jones...

SteveS

Hey eebtr7, just remember if the BSA designers had got there way back in the early 70's your B50SS would have come fitted with a hydraulic front brake as standard from new

SteveS

. Hi Claus During the film Angus does state that the owner calls the engine P55. I've not seen reference to this engine before. With reference to Edward Turner you are correct that by 1967 Turner had set up his own consultancy company, ETED, Edward Turner Engineering Developments (?). I do not have...

SteveS

Hi Basil

I was going to raise the same query as Gerry. Now you have explained it I can see the offset from the picture of the brake cylinder you provided

SteveS

+1

Nice work

SteveS

Hi Paul

Is the 'Blueprinting B25 Engine - Mike Rothwell' book any good? Never seen a review of it

SteveS

Regarding the exhaust pipe I'd be tempted to drill a hole through the tube from the opposite side, maybe 1/4" and then used a piece of 1/4" steel rod with a domed end on it and spend a bit of time knocking out the dent. You may be surprised at how well it comes out. Weld up the hole you drilled when...

SteveS

Don't forget that Chris at Ripe Motorcycles has been flying the flag for a few years now with his BSA Electric bike; although I don't know how much longer his licence has got to run:

BSA John McLaren TAG

SteveS

+1 what Momus said

SteveS

Agree with Ian about the indicator stems, go with 3" front and back

SteveS

Very nice find

Did you really get it for $700?

SteveS

Hi Basil

Hope it works out

. Looking forward to a write-up

SteveS

Hi Basil

I've noted numerous discussions on other forums regarding the drillings of various Amal components (including pilot jets cross drillings) indicating that stated sizes vary, so worth checking prior to fitting

SteveS

Hi Claus You don't know what damage the frame may have suffered over the years so best follow Momus's advice regarding chain alignment first and then sort out the spacers. You may also have to remove the cross tube that links the footrest mounts so that the oil pipe union on the bottom of the motor ...

SteveS

+1 what Kommando said, it would make a fitting tribute to Stan's wise words

SteveS

Totally devastated by the news His absence on the forum had been noted. He helped me out numerous times with advice and parts and I won't forget him. ................ and if anyone is ever searching for advise about B50's you should do no more than search under his username 'HPbyStan' on this Forum ...

SteveS

Just for reference I have measured a couple of dual seats, the spacing of the mounting studs is 8.1/2" (216mm). The frame mounted metal bracket the stud locates into has a diameter of 7/16" (11mm) - the stud is 5/16", so the factory made a generous allowance for tolerance due to variations in seat t...

SteveS

Hi bbenxe There does seem to be some slight variation in the size and location of the brackets. I'd very tempted to offer up the seat you intend to use and weld the brackets to fit your seat. Of the three complete oif singles I have at the moment 2 are a complete pig to fit the seat requiring pushin...

SteveS

Hi Malc

I read the same ad the other day and thought the same as you

P.S. Did you see it in that new A65 book?

SteveS

.
£5,250 for just the frame?

Do you think the vendor got the decimal point in the wrong place?

Or maybe the wrong currency?

SteveS

Thanks homebrew123

They've just miraculously appeared on ebay in Chris's on-line shop

SteveS

Anyone know a UK source for the horseshoe tank rubbers, 83-3563, 3/4" thick at top? I though there were some listed on ebay but not been able to track them down. Any help appreciated

SteveS

Hi johnu

I agree with Momus that a 6mm tufnol or equivalent spacer would help. However it looks to me that the stud is too long. All my B50's are only showing a maximum of a couple of threads visible after the nut. Overall length of stud should be 1.1/4"

: B50 carb studs

SteveS

Hi Jon I'll be interested in any replies you get as one on my B50T has just sheared and one on the WDB40 did the same a couple of weeks ago. Not sure if its to do with ethanol fuel causing the rubber seal to swell so tight that the force you apply to move the lever overcomes the strength of the meta...

SteveS

Hi Bob

Alan's notes make interesting reading......

Regarding the XON series of registrations there are others on the forum that will be able to contribute more accurately than I can

SteveS

Hi Bob, thanks for the additional info and pics.

You mentioned the bike was used as works transport, is it one of the 'XO' series of registrations that were kept for use by BSA?

SteveS

Fantastic

If you get stuck on detail Paul (beesa71) may be able to help, reference the original M&T version

SteveS

Hi Basil

Are you upgrading the B50 to a single disc front end?

The same item is a bit cheaper from BBB:

stainless-front-master-cylinder-c-w-lever-triumph-1973-78 £112.80 + £9.54 shipping

SteveS

Hi Bob Thanks for sharing :thumb Makes interesting viewing. Essentially oif chassis converted to isolastic with a disc front end, although there must be a lot of other detail changes. They lost the under tank electrics box. I can see the coil still under the tank. Where'd they put the rest of the el...

SteveS

.
A bit more welding completed. Set up with wheels and suspension to check monoshock top mount location
.

: Rolling chassis

.

: Monoshock and front engine mounts completed

.

: A few more frame brackets in place

SteveS

Looking good

SteveS

Hi johnu

Here you go:

B50 Decompression Lever - A DRZ400 S u z u k i, compliments of Stan Millard

SteveS

.
A little more progress
.

: Cut out old gusset and tubes

.

: Replaced straight tubes with bent ones to clear suspension

.

: Mock up with s/arm and monoshock

SteveS

Hi Andy

Which side of the engine are you looking at?

anticlockwise from the clutch side

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