Search found 871 matches

by BSA_WM20
Tue Dec 03, 2019 11:20 pm
Forum: Tech
Topic: B50 7" Headlamp
Replies: 10
Views: 283
Flag: Australia

Re: B50 7" Headlamp

Mine has the 7 " pancake light .
I am in OZ
And yes BSA specs were different in different markets and always have been right back to the 20's .
I have a 26 & 27 B2 Both are the same but they are substantially different to what the parts book says they should be.
by BSA_WM20
Mon Nov 25, 2019 7:50 am
Forum: Tech
Topic: Connecting Rod Big End bearing too wide? Negative clearance present
Replies: 11
Views: 591
Flag: Australia

Re: Connecting Rod Big End bearing too wide? Negative clearance present

There was a bunch of pre-unit single big ends around a while back where the radius at the end of the taper was too big which prevented the flywheels being drawn fully onto the taper.

It might be a trick of the angles but the bearing looks to be narrower than the con rod which of course will not work
by BSA_WM20
Tue Nov 19, 2019 4:34 am
Forum: Parts for sale
Topic: Scammer ?
Replies: 1
Views: 315
Flag: Australia

Scammer ?

Just seen an interesting post on the C10-11-12 forum. One member was looking at purchases from this site Lievremarket.com The images all appear to be taken from different web sites and there is no consistency with the prices, many of which are below wholesale So it would appear to be a scam site bew...
by BSA_WM20
Sun Nov 03, 2019 11:28 am
Forum: Tech
Topic: 1000-Series 2/4-stroke Concentrics
Replies: 102
Views: 11755
Flag: Australia

Re: 1000-Series 2/4-stroke Concentrics

Sales catalogs were prepared well in advance so there are differences between what is shown and what was in the showroom. Also, taking the Gold Star as an example, the parts manual issued in 1958 seemingly covers all DBDs. However, like for other bikes, I have a very large stack of Bulletins detail...
by BSA_WM20
Tue Oct 15, 2019 8:24 am
Forum: Tech
Topic: Oil use by date
Replies: 13
Views: 1211
Flag: Australia

Re: Oil use by date

The oil itself doesn't wear out, but the additives certainly do. Here's a study that supports the viscosity degradation due to use: https://www.researchgate.net/publication/272748220_Analysis_of_Lubricating_Oil_Deterioration_in_Four-Wheeler . I would not consider that article proof of anything othe...
by BSA_WM20
Sun Oct 13, 2019 4:59 am
Forum: Tech
Topic: Oil use by date
Replies: 13
Views: 1211
Flag: Australia

Re: Oil use by date

Not only does oil not expire, it doesn't wear out. Let me qualify that: multi-grade oils in service will trend towards the lower (Winter) viscosity of their grade as they're used, e.g., 20W50 will eventually become 20 weight because the long chains that respond to temperature get sliced up and even...
by BSA_WM20
Sun Oct 13, 2019 4:42 am
Forum: Tech
Topic: B25 oil filter on B50
Replies: 4
Views: 572
Flag: Australia

Re: B25 oil filter on B50

And there were 2 filters fitted to the WD B40's , one of which from memory was the same unit fitted to the B25's. These are messy as they have a filter fitted inside the outer cover and in their infinite stupidity BSA fitted them horizontal so there is no way to take them off without getting oil eve...
by BSA_WM20
Sat Oct 05, 2019 10:31 am
Forum: Tech
Topic: Head gasket
Replies: 10
Views: 1072
Flag: Australia

Re: Head gasket

Always check the timing mark. IT should be fully advanced at around 3500 or there abouts. Unfortunately the same rotor fits almost every British bike made since in 60 so there is no reason the expect it is a B50 one or for that matter even a BSA one thus the timing line might not be exactly in the c...
by BSA_WM20
Thu Sep 26, 2019 2:34 pm
Forum: News
Topic: Rickard and the Distinguished Gentleman's Ride 2019
Replies: 4
Views: 691
Flag: Australia

Re: Rickard and the Distinguished Gentleman's Ride 2019

Well I did try but the form will not allow you donate without a full name and full street address. So sorry I will do a paypal direct donation if you like but I am not going to put my personal details on a donation file. There is enough phishing going on without this site doing the same. I still get...
by BSA_WM20
Wed Sep 25, 2019 10:36 am
Forum: Tech
Topic: B44 Old girl starts, needs lots of tickling to warm up then go's well!
Replies: 17
Views: 1404
Flag: Australia

Re: B44 Old girl starts, needs lots of tickling to warm up then go's well!

At idle all of the fuel passes through the primary circuit, not the main jet Thus you can be lean at idle & rich at WFO This is exactly the problem that occurs when the pilot circuit is blocked Float height affect the pilot far more than the main because there is a very tiny amount of suction ( ok s...
by BSA_WM20
Tue Sep 24, 2019 9:55 am
Forum: Tech
Topic: B44 Old girl starts, needs lots of tickling to warm up then go's well!
Replies: 17
Views: 1404
Flag: Australia

Re: B44 Old girl starts, needs lots of tickling to warm up then go's well!

Have you checked the fuel level in the float bowl ? London to a brick & on you will find it a touch low. And yes I know you said the carb was new but that is no reason to assume that the float is set right. Decades ago I fitted a nipple to a drain plug and use that to check the float heights. They w...
by BSA_WM20
Tue Sep 17, 2019 12:04 pm
Forum: Tech
Topic: Dating a B50SS
Replies: 14
Views: 1377
Flag: Australia

Re: Dating a B50SS

Roy Bacon was one of the reasons for the decline of the British motorcycle industry. He was a motor writer ( not journalist ) for several motor magazines published by the same company. However what he did was to keep every piece of literature that the various factories sent to them. When he retired ...
by BSA_WM20
Tue Sep 17, 2019 11:20 am
Forum: Tech
Topic: Annoying Loose Lucas Indicators
Replies: 7
Views: 1030
Flag: Australia

Re: Annoying Loose Lucas Indicators

The stems are firm, but they vibrate and the longer they are the greater the vibration at the end. The greater the vibration the more likely they will vibrate loose. Using the shorter front stems makes a big difference It also makes a difference to the cracking of the rear guard around the tail ligh...
by BSA_WM20
Mon Sep 16, 2019 10:03 am
Forum: Tech
Topic: Dating a B50SS
Replies: 14
Views: 1377
Flag: Australia

Re: Dating a B50SS

"Note, it was not the 1627th B50SS built. Other models came first of which could have been A65's, A75's, B50T's or B50MX's." That's not true; singles were in one 'number' run and other models had their own. It is correct that the singles run included BSA, Triumph, 250's and 500's. Usually, but not ...
by BSA_WM20
Mon Sep 16, 2019 10:02 am
Forum: Tech
Topic: Annoying Loose Lucas Indicators
Replies: 7
Views: 1030
Flag: Australia

Re: Annoying Loose Lucas Indicators

First trick is to swap the way too long real stems for the shorter front stems . This is in fact illegal in a lot of places but the era of Mr Plod producing a tape measure then quoting vehicle regulations are long gone. Next is a pair of jamb nuts either side of the blinker housing with anti-vibrati...
by BSA_WM20
Sat Sep 07, 2019 11:33 am
Forum: Tech
Topic: B25T Rear Chain Oiler – Cap Off?
Replies: 17
Views: 2285
Flag: Australia

Re: B25T Rear Chain Oiler – Cap Off?

Air filter foam should be fine provided it does not do a swan dive into the primary.
by BSA_WM20
Wed Aug 28, 2019 10:19 am
Forum: Tech
Topic: B25T Rear Chain Oiler – Cap Off?
Replies: 17
Views: 2285
Flag: Australia

Re: B25T Rear Chain Oiler – Cap Off?

One of the bikes had a vent via an inspection cap.
I have some kicking around with a hole in them.
All in exactly the same place.
by BSA_WM20
Wed Aug 28, 2019 8:13 am
Forum: Tech
Topic: B25T Rear Chain Oiler – Cap Off?
Replies: 17
Views: 2285
Flag: Australia

Re: B25T Rear Chain Oiler – Cap Off?

Drill a tiny hole in the chain inspection cap
by BSA_WM20
Sun Aug 25, 2019 9:09 am
Forum: Int BSA Rally and other meetings
Topic: National bsa Rally South Australia
Replies: 8
Views: 2401
Flag: Australia

Re: National bsa Rally South Australia

Sorry, not this year for Lynn and I. I gather they are going to use it as a trial for the International. Some BSA friends from Canberra will be there. I need to be at work so I can retire just after my birthday that same week and family want to celebrate both events that same weekend as the rally. ...
by BSA_WM20
Fri Aug 23, 2019 9:38 am
Forum: Int BSA Rally and other meetings
Topic: National bsa Rally South Australia
Replies: 8
Views: 2401
Flag: Australia

Re: National bsa Rally South Australia

I will be there. Still havent put any of the piles of junk back together into something that resembles a motorcycle so it will be the M20 again. Popping up to Williams Creek to cross Lake Eyre in flood off the bucket list then home via Broken Hill as I have not been there either. Originally planned ...
by BSA_WM20
Mon Aug 05, 2019 9:59 am
Forum: Tech
Topic: ongoing problem/headlight wire
Replies: 20
Views: 2495
Flag: Australia

Re: ongoing problem/headlight wire

It is probably a simple resonance thing. Simple in theory , impossible in practice to work out. The chrome plating makes it worse particularly if the chrome did not get a couple of heavy coats of copper over a highly polished surface so prevent the micro cracking on the chrome becoming a crack initi...
by BSA_WM20
Sun Aug 04, 2019 8:33 am
Forum: Tech
Topic: ongoing problem/headlight wire
Replies: 20
Views: 2495
Flag: Australia

Re: ongoing problem/headlight wire

My thoughts would be to take a broken one to a wire fabricator and get one made in a 400 grade of stainless. My B50 had the pancake headlamp so the only other though would be yours are under stress on the smaller headlamp. I also do not remember a heavy steel brace inside the shell. Next questin is ...
by BSA_WM20
Sat Jun 22, 2019 12:05 am
Forum: Tech
Topic: 8inch front brake
Replies: 16
Views: 3408
Flag: Australia

Re: 8inch front brake

To be honest Gerry, I really can not remember. Not much chance of a photo in the immediate future , there are 14 bikes ( or will be bikes ) and about 6 tons of parts between it & the door. The container was an "emergency temporary" storage when I moved. The 2 20 x 10 sheds that are to replace it are...
by BSA_WM20
Thu Jun 20, 2019 12:25 pm
Forum: Tech
Topic: 8inch front brake
Replies: 16
Views: 3408
Flag: Australia

Re: 8inch front brake

Hi in reply to BSA wm20's comment can I ask a couple of questions. First is you recommend a rear brake spring on the rear lever only then go on to describe your brake as having a spring fitted to both levers. Are you able to explain why this is? Second is you don't seem to be recommending a heavier...
by BSA_WM20
Wed Jun 19, 2019 8:20 am
Forum: Tech
Topic: 8inch front brake
Replies: 16
Views: 3408
Flag: Australia

Re: 8inch front brake

The problem is the outer case is a lot heavier than the inner so what happens is the outer just barely moves enough to allow the shoe to stop making contact and the inner takes up all of the slack. The solution is to put a rear brake clock spring on the rear lever. Also make sure that the outer is n...
by BSA_WM20
Sun Jun 02, 2019 3:33 pm
Forum: Tech
Topic: Tube Size
Replies: 4
Views: 1441
Flag: Australia

Re: Tube Size

It will all depend upon the quality of the tube. f it is a cheap tube that was very thin to start with and you are now stretching it even further than it was designed to go then it will be more lible to a catrastropic failure. If it is an expensive tube with thicker rubber it will not make any diffe...
by BSA_WM20
Fri May 31, 2019 9:37 am
Forum: Tech
Topic: B44 Alternator Repair
Replies: 7
Views: 1854
Flag: Australia

Re: B44 Alternator Repair

[quote=Canberra post_id=77941 time=1559279458 user_id=27] I believe the rotors that were prone to failures on earlier engines were replaced by a modified unit. So only replace with a new rotor and don't look at a second hand one. I think the magnets are stronger as I gather the originals loose magne...
by BSA_WM20
Wed May 29, 2019 9:31 am
Forum: Tech
Topic: b25ss timing cover bung plug/past shortage of B50 kickstart quadrants
Replies: 17
Views: 2894
Flag: Australia

Re: b25ss timing cover bung plug

Interesting. Definately not a B25ss part and not a B40 GA part either Might be for a B40GB. A bit miffed about how it would be for the gearbox oil as that section of the cavity between the inner & outer cover should be dry. If it is full of gear oil then that would make the engine crankcase breather...
by BSA_WM20
Mon May 20, 2019 7:22 am
Forum: Tech
Topic: c15c - B44 type frame
Replies: 19
Views: 3188
Flag: Australia

Re: c15c - B44 type frame

Down here there are 1973, 1974 1975 & 1976 A 65's Most are 71 models, with 72 upgrades fitted and all sorts of engine & frame numbers. A friend had a 1974 A 65 that was 10 numbers away from my USA spec 1973 and had a German compliance plate fitted to the frame & painted Interplod white. Apparently y...
by BSA_WM20
Sat May 04, 2019 6:05 am
Forum: Tech
Topic: Truckle slide
Replies: 20
Views: 3935
Flag: Australia

Re: Truckle slide

I would bend a slightly different way The two pilot circuit holes are very small and in the middle of the bottom of the mixing chamber Thus only the air rushing across the exact centre of the throat will be causing the venturi effect to suck the idle mix out of the tiny idle ports. Concentrating the...
by BSA_WM20
Tue Apr 23, 2019 7:25 am
Forum: Tech
Topic: 1000-Series 2/4-stroke Concentrics
Replies: 102
Views: 11755
Flag: Australia

Re: 1000-Series 2/4-stroke Concentrics

I have a similar tool. It is called a colortune. No wires no batteries, just a window into the cylinder so you can see the colour of the combustion flame Fairy simple yellow = too rich white = too lean Black = no combustion Blue = just about right. I would have suggested it to MM but he really likes...
by BSA_WM20
Wed Apr 17, 2019 11:40 am
Forum: Tech
Topic: Bsa b40g engine tuning
Replies: 20
Views: 3529
Flag: Australia

Re: Bsa b40g engine tuning

The B 50 needle roller needs to be treated with a lot of respect. It is a very high speed roller bearing and if used under load at low revs will scuff the cage on the outer race till eventually the cage breaks up. The broken bits of the cage will be hammer welded onto the outer race & the engine wil...
by BSA_WM20
Thu Apr 11, 2019 10:14 am
Forum: Tech
Topic: Remote Oil Filter B40/B44
Replies: 10
Views: 2067
Flag: Australia

Re: Remote Oil Filter B40/B44

And it does make a difference which way the pipes are connected if the filter cartridge has a back flow valve. I use a similar filter but threaded 3/4 x 16 NP. Thus I can use lawn mower filters rather than car filters as I can get them very cheap . Mower filters all have very low bypass valves and n...
by BSA_WM20
Mon Apr 08, 2019 5:58 am
Forum: Tech
Topic: Imperial thread sizes
Replies: 16
Views: 2196
Flag: Australia

Re: Imperial thread sizes

getting way off topic but there was a lot of others factors. The over riding one being a somewhat arrogant belief that the UK was "naturally" better at designing & building motorcycles. Followed by university graduates becoming formula managers with no understanding of the product because all manage...
by BSA_WM20
Sun Apr 07, 2019 4:55 pm
Forum: Tech
Topic: Imperial thread sizes
Replies: 16
Views: 2196
Flag: Australia

Re: Imperial thread sizes

BSA was a good example of a vertically intergrated company They owned coal mines that dug the coal with machines made by BSA, processed by plants made by BSA hauled in trucks built by BSA ( or at least Daimler engines ) burned in furnaces made by BSA to run their factories. They owned the company th...
by BSA_WM20
Sun Apr 07, 2019 3:21 am
Forum: Tech
Topic: Imperial thread sizes
Replies: 16
Views: 2196
Flag: Australia

Re: Imperial thread sizes

Taps and Dies are rated on the percentage of material removed to make the thread. A 100% would have zero clearance between the threads of the nut and bolt and would be very hard to put together. So if you drill the hole before you tap for 100% then you will have full size threads. But if you drill ...
by BSA_WM20
Fri Apr 05, 2019 11:57 pm
Forum: Tech
Topic: 1000-Series 2/4-stroke Concentrics
Replies: 102
Views: 11755
Flag: Australia

Re: 1000-Series 2/4-stroke Concentrics

MM will most likely post his final results here because he is a man of his word and he said he would.
However if you want to follow the work as it progresses search the same titled thread in the Gold Star section of the Britbike site which is where this thread originated from.
by BSA_WM20
Fri Apr 05, 2019 11:52 pm
Forum: Tech
Topic: Imperial thread sizes
Replies: 16
Views: 2196
Flag: Australia

Re: Imperial thread sizes

As much as it urks me to force a wrong thread into a hole the boys are quite right . All the 1/4" x 26 tpi are whitworth profile ( BSF ). Even tools like thread chasers for a lather are also the wrong profile. OTOH I do have a die set from the 50's where the CEI die is the correct angles. So if you ...
by BSA_WM20
Tue Apr 02, 2019 4:08 am
Forum: Tech
Topic: 1000-Series 2/4-stroke Concentrics
Replies: 102
Views: 11755
Flag: Australia

Re: 1000-Series 2/4-stroke Concentrics

Same post on a different forum brings different things to mind ... I assume that you have already found this thread... Trevor, I joined B50.org at Shane's urging. He thought someone here might have the answer I seek. Yes, I had found that thread some time ago but it doesn't address my question. Sen...
by BSA_WM20
Mon Apr 01, 2019 2:01 am
Forum: Tech
Topic: 1000-Series 2/4-stroke Concentrics
Replies: 102
Views: 11755
Flag: Australia

Re: 1000-Series 2/4-stroke Concentrics

Funny how one compartmentalizes ones brain. Same post on a different forum brings different things to mind Stan Millard ( Hp by Stan ) would be the go to person. Fairly sure he did a bit on amal 1000's some time back. He has not really posted much since his hospital visit last year but might respond...