Search found 969 matches

by BSA_WM20
Fri Sep 03, 2021 7:00 am
Forum: Tech
Topic: New B50MX owner with questions
Replies: 12
Views: 933

Re: New B50MX owner with questions

BE nice & change the oil What happens is it wet sumps so the level in the tank drops Hot Rod Harry checks the oil, engine cold & off, then fills to the dipstick Once started there is now way too much oil in te system so it finds every hole to escape from. Best to check the oil wheb you get back from...
by BSA_WM20
Fri Sep 03, 2021 6:56 am
Forum: Tech
Topic: Need Short Term Solution For Breather Hose Filter
Replies: 3
Views: 388

Re: Need Short Term Solution For Breather Hose Filter

A petrol filter will do fine
by BSA_WM20
Sat Jul 10, 2021 10:13 am
Forum: Tech
Topic: Carburettor choice for b50
Replies: 49
Views: 5256

Re: Carburettor choice for b50

When you are bored, or stuck inside because of Covid lockdowns, have a look at some of the "How to start a motorcycle " videos Watch closely the right hands ans see just how many are opening the throttle while they are leaping from a great height, paticularly those who start on the center stand. And...
by BSA_WM20
Sat Jul 10, 2021 10:09 am
Forum: Tech
Topic: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)
Replies: 45
Views: 9382

Re: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)

Gees Mark that reply took a long time. I used to write for a technical manual company and the odd motorcycle article. Dreamed on being a journalist but way too honest for that but can type at a reasonable pace . You are lucky you were never in one of my classes. OTOH every one knows who you are so t...
by BSA_WM20
Fri Jul 09, 2021 9:01 am
Forum: Tech
Topic: Carburettor choice for b50
Replies: 49
Views: 5256

Re: Carburettor choice for b50

More technique & knowing your bike than brute strength I got my B50 3 years before hitting the truck and I used to allow nearly 1/2 hour just in case it did not start When I could finally walk again & had to learn to left foot start, it started first kick nearly every time And it is an easy kick if ...
by BSA_WM20
Wed Jul 07, 2021 9:07 am
Forum: Tech
Topic: where to place Boyer ignition Box
Replies: 5
Views: 1478

Re: where to place Boyer ignition Box

Mine was on the steering stem between the frame & the petrol tank
Seemed to work fine there
by BSA_WM20
Sun Jul 04, 2021 8:58 am
Forum: Tech
Topic: Carburettor choice for b50
Replies: 49
Views: 5256

Re: Carburettor choice for b50

] I do like the round slide mikunis but with a buggered right knee I do need the bike to start as easy as possible I used to have a mikuni round slide that someone had fitted a tickler button too After looking through my spare carbs I also have a 30mm concentric Mk1 that's been sleeved but has a 4 ...
by BSA_WM20
Sat Jul 03, 2021 2:12 pm
Forum: Tech
Topic: Carburettor choice for b50
Replies: 49
Views: 5256

Re: Carburettor choice for b50

Hi Baz, If you have a standard 32 mm Concentric mk 1 in good condition I would try that as a start. You don't tell if the engine is standard or not but if no changes to cam etc. the factory settings should get you running: B50 carb.JPG My experience is that the Concentric carb works fine provided t...
by BSA_WM20
Thu Jun 24, 2021 9:23 am
Forum: Tech
Topic: Engine Bolt Torque Settings
Replies: 8
Views: 1391

Re: Engine Bolt Torque Settings

If it really worries you then there are hundreds of refference tables on the web listing torques for fasteners Back in the day mechanics who used tension wrenches would know these values off by heart. Remember these are through bolts so the values are generic unlike things like head bolts that are t...
by BSA_WM20
Wed Jun 23, 2021 9:59 am
Forum: Tech
Topic: Engine Bolt Torque Settings
Replies: 8
Views: 1391

Re: Engine Bolt Torque Settings

When these bikes were new, torque wrenches were exotic things found in aircraft factories & defence establishments GEt some high tensile split washers and tighten till the washers are just flattened. Note there are "packing pieces between the frame & the through bolt. Tighten the front & back mount ...
by BSA_WM20
Wed Jun 02, 2021 3:50 pm
Forum: Tech
Topic: Inner Tubes
Replies: 11
Views: 2148

Re: Inner Tubes

I use a breezer as well Just so easy and no pinching. However your tube does not look like a pinch, it looks like a crease that happens because the tube is twisted inside the tyre when first inflated. That is why after seating the bead, you deflate the tube which should then straiten itself out now ...
by BSA_WM20
Mon May 31, 2021 2:39 am
Forum: Tech
Topic: Inner Tubes
Replies: 11
Views: 2148

Re: Inner Tubes

It is a three fold problem First is the fact that tubes now days are large range multi fit universal sized And by universal that means fits all rims poorly This means that in the smaller sizes there is a tendency for th tubes to fold over onto themselves and the crease eventually becomes a split . T...
by BSA_WM20
Thu May 13, 2021 9:02 am
Forum: Tech
Topic: Brake grill
Replies: 8
Views: 2242

Re: Brake grill

No Idea
This brake was the reason why I started making my own cables so all I ever do is replace the inner
As the inner has pear on both ends so it can rotate freely they last just about forever .
by BSA_WM20
Tue May 11, 2021 9:26 am
Forum: Tech
Topic: Brake grill
Replies: 8
Views: 2242

Re: Brake grill

Thanks Steve I knew I had the service sheet somewhere The critical thing is REMOVE THE CABLE COMPLETELY then adjust each shoe then replace the cable and take up the slack If the rear drags then put a clock spring on it to pull it off the drum And the cable must be completely free and not tied to the...
by BSA_WM20
Mon May 10, 2021 9:22 am
Forum: Tech
Topic: Brake grill
Replies: 8
Views: 2242

Re: Brake grill

They only give poor braking when not adjusted or used properly The same brake was used by BMW & on A75's If they can stop an A 75 from 120 mph then you are over braked on a B 50 On my A65 once adjusted properly the brake was strong enough to lock the front wheel, two up at 80mph when I saw what I th...
by BSA_WM20
Sun May 09, 2021 8:42 am
Forum: Tech
Topic: TR5T 4 position ignition switch
Replies: 5
Views: 1588

Re: TR5T 4 position ignition switch

Parking light
Off
On
On with lights
by BSA_WM20
Mon May 03, 2021 10:08 am
Forum: Tech
Topic: Non Detergent oil test Part II-
Replies: 21
Views: 4705

Re: Non Detergent oil test Part II-

Hopefully there will be a BSA National in Victoria this year but the BSAOA are very non committal at the moment.
Good thing is nationals are cheaper to throw on than the ABR.
by BSA_WM20
Sat May 01, 2021 4:37 am
Forum: Tech
Topic: Wrong for all the right reasons
Replies: 10
Views: 2838

Re: Wrong for all the right reasons

Nice basement Jeff.
I see you can not throw away a useful carton either :lol:
Your problem, Beeseritus , is quite common & before I went belly up it was rampant at my place as well.
by BSA_WM20
Sat May 01, 2021 4:33 am
Forum: Tech
Topic: Wrong for all the right reasons
Replies: 10
Views: 2838

Re: Wrong for all the right reasons

Not so much as to kill the engine, but to attribute it's death to the wrong cause for the right reasons. I have probably seen this happen 20 or more times . A BSA owner joins the club having bough his first bike since he got married and is keen to prove he is 20 again ( no hope ) They either bought ...
by BSA_WM20
Fri Apr 30, 2021 5:40 am
Forum: Tech
Topic: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)
Replies: 45
Views: 9382

Re: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)

While the engine had been professionally rebuilt the burning question is. How long ago ? How long has the engine been sitting idle? Was it properly primed before being started ? And I am no angel when it comes to this having shortened the working life of more than one engine by not properly priming ...
by BSA_WM20
Fri Apr 30, 2021 5:26 am
Forum: Tech
Topic: Wrong for all the right reasons
Replies: 10
Views: 2838

Wrong for all the right reasons

I was going to tack this onto the end of Jeff's post , but I think it is about closed as is. Now everybody consider this situation Bob buys a nice new B25 really cheap in 1976 because the factory has closed & he got it from the new S*zuki dealer ( former BSA ) with no warranty. Bob is a good bike ow...
by BSA_WM20
Mon Apr 26, 2021 3:01 am
Forum: Tech
Topic: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)
Replies: 45
Views: 9382

Re: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)

Everything Jeff, except for an understanding about what will & will not build up in & block off the internal centrifugal oil filter . And we are in total agreement about proper maintenance & oil changing, no arguement . And also on how to bring an old engine into service again What we disagree on is...
by BSA_WM20
Mon Apr 26, 2021 2:31 am
Forum: Tech
Topic: Non Detergent oil test Part II-
Replies: 21
Views: 4705

Re: Non Detergent oil test Part II-

If the label on the oil bottles says it will "Clean" then the oil contains SOLVENTS And SOLVENTS can be put into any fluid , dishwashing fluid, petrol or even non detergent oil . So again all you have shown is the oil in used does what it says it will do on the label . Old farts like me remember oil...
by BSA_WM20
Sun Apr 25, 2021 1:48 pm
Forum: Tech
Topic: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)
Replies: 45
Views: 9382

Re: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)

What you are missing Jeff is a proper understanding about how the oil system works. Sludge does not get created inside the crank where the oil is flowing at substantial speed. It forms in places where the oil slows down like the oil tank which in filtering terms is called a setteling tank. Apart fro...
by BSA_WM20
Sun Apr 25, 2021 12:52 pm
Forum: Tech
Topic: Non Detergent oil test Part II-
Replies: 21
Views: 4705

Re: Non Detergent oil test Part II-

Jeff, With all due respects, All you have established is when the dirty gauze was dropped into the container with the specific detergent oil you used some of the sludge dispersed At best it could be called an observation and definately not an experiment . Did you try to wipe it clean with a shop tow...
by BSA_WM20
Sun Apr 25, 2021 5:40 am
Forum: Tech
Topic: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)
Replies: 45
Views: 9382

Re: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)

Trevor, actually a lot has changed in the last 40 years, and your your 13 week course will have very little relevance to the knowledge of oil technology today, unless maybe you are suggesting engine oil development has stood still since then? Jeffk was careful not to draw conclusions, and has left ...
by BSA_WM20
Sat Apr 24, 2021 11:54 am
Forum: Tech
Topic: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)
Replies: 45
Views: 9382

Re: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)

The problem comes with peoples missunderstanding about what a detergent molecule is and how they work. It all goes back to a dunken advertising copy writer suffering cocain withdrawl who failed chemistry when he was 12 and never did any since then. When trying to find something to make people buy a ...
by BSA_WM20
Sat Apr 24, 2021 11:19 am
Forum: Tech
Topic: Non Detergent oil test Part II-
Replies: 21
Views: 4705

Re: Non Detergent oil test Part II-

For the 10 mllionith time Detergent oils do not clean your engine. Get that idea right out of your head. A detergent molecule is bi-polar. On end will stick to anything that is not oil & the other only sticks to oil Thus when they bump into particulates they envelope them, preventing the particulate...
by BSA_WM20
Sun Apr 18, 2021 1:22 pm
Forum: Tech
Topic: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)
Replies: 45
Views: 9382

Re: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)

"The detergent in the oil picks up the carbon and other solid material and the dispersant keeps it in solution.
Again WRONG

The detergents simply coat the carbon particles preventing them from joining together with anything else .
DIspersants are detergents & detergents are dispersants
by BSA_WM20
Sun Apr 18, 2021 1:18 pm
Forum: Tech
Topic: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)
Replies: 45
Views: 9382

Re: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)

Another factor is if it was last used with non-detergent oil which left a lot of sludge here-and-there inside the surfaces of the engine. If this is the case, and you introduce detergent oil to the engine, all of this "stuff" left from years of combustion, etc. gets cleaned off by the detergent and...
by BSA_WM20
Sun Apr 18, 2021 1:07 pm
Forum: Tech
Topic: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)
Replies: 45
Views: 9382

Re: Ariel Square 4 had same problem with oil as B25 (Non Detergent oil)

Until someone can explain how a detergent oil can negate centrifugal forces that are used by the sludge traps the detergent vs non detergent argument is not applicable to sludge trap equipped engines. Fairly simple Kommando Detergent oils prevent contaminants aglomerating into bigger lumps of crud,...
by BSA_WM20
Thu Mar 18, 2021 9:27 am
Forum: Tech
Topic: What length turn signals?
Replies: 8
Views: 3286

Re: What length turn signals?

The answer is, no answer. There was no standard length. It was dependent upon where the bike was sold Down here blinkers had to be 18" apart So longer stems on the rear as they were bolted to the rear light bracket which is about 3" wide On the front they were bolted to the headlight which is 7 " wi...
by BSA_WM20
Fri Mar 05, 2021 5:43 am
Forum: Tech
Topic: Best Ball Bearing Brands?
Replies: 9
Views: 4376

Re: Best Ball Bearing Brands?

The brand on the box is nowhere near as important as where you buy them from Chinese manufacturers will put any name on a bearing that the customer wants them to . Bearing shops have a reputation to protect so generally will only source bearings from a reputable supplier. On the web it is a lucky di...
by BSA_WM20
Thu Feb 11, 2021 11:42 pm
Forum: Tech
Topic: B50 hydraulic drum brake
Replies: 58
Views: 16687

Re: B50 hydraulic drum brake

The original backing plate is an Al-Si-Cu die casting, which from memory was BS 401 in the old system. This alloy age hardens and becomes substantially more brittle over time. This should not be a problem is the loads are applied dead square to the casting as all of the load is compressive. But wear...
by BSA_WM20
Thu Feb 11, 2021 11:23 pm
Forum: Tech
Topic: B50 ignition switch
Replies: 12
Views: 5575

Re: B50 ignition switch

Parking lights are important in places like the UK were back roads are barely wide enough for a motorcycle let alone a car , truck or tractor. Down here where lad was not as limited, roads are generally wider and there is sufficient verge to park off the trafficable section of the road. Thus parking...
by BSA_WM20
Fri Feb 05, 2021 11:19 pm
Forum: Tech
Topic: B50 hydraulic drum brake
Replies: 58
Views: 16687

Re: B50 hydraulic drum brake

Way back when I had long hair & a full set of teeth engine braking was fine. Even in a big city like Sydney, one vehicle a minute was considered to be congestion. Now days when 1 vehicle a micro second is considered normal flowing traffic & computer controlled acceleration & braking has the car in f...
by BSA_WM20
Tue Feb 02, 2021 11:17 am
Forum: Tech
Topic: B50 hydraulic drum brake
Replies: 58
Views: 16687

Re: B50 hydraulic drum brake

Yes ,
But did they use the same backing plate all season or regularly swap it over like most parts on a race bike ?
by BSA_WM20
Wed Jan 27, 2021 10:55 am
Forum: Tech
Topic: B44 piston into a B40
Replies: 2
Views: 2283

Re: B44 piston into a B40

Depends if you like a nice soft 6.5:1compression ratio
The B 40 is a B 25 with a bigger bore
The B 44 is a B 40 with a longer stroke thus the piston is shorter pin to crown.
by BSA_WM20
Mon Jan 25, 2021 11:51 am
Forum: Tech
Topic: Piston ring gap
Replies: 6
Views: 3047

Re: Piston ring gap

YES Total Seal use a wider gap on the top ring in order to make the 2nd ring work properly As they described it to me when I questioned it. They consider the top ring as nothing more than a fire ring to take the heat & shock loading from the exploding chare The 2nd ring provides the seal if it can g...
by BSA_WM20
Fri Jan 22, 2021 9:37 am
Forum: Tech
Topic: Piston ring gap
Replies: 6
Views: 3047

Re: Piston ring gap

And if using the gapless rings, the gapless one goes in the 2nd position.