Search found 920 matches

by BSA_WM20
Tue Nov 17, 2020 11:42 am
Forum: Tech
Topic: Fitting Allen screws to rocker box on B50.
Replies: 35
Views: 5004

Re: Fitting Allen screws to rocker box on B50.

The problem with using coarse threads in the head is there is insufficient metal in the floor over the push rod tube for a coarse thread. Ideally you should have a minimum of 3 full turns of thread on any fastener. More in soft materials like aluminium. If you think this is BS then count the threads...
by BSA_WM20
Fri Nov 13, 2020 8:56 am
Forum: Tech
Topic: b40 engine weight ???????
Replies: 4
Views: 195

Re: b40 engine weight ???????

More like 10 kg heavier as it has a real flywheel as well
by BSA_WM20
Sat Oct 31, 2020 7:54 am
Forum: Tech
Topic: Rebuild Compression
Replies: 23
Views: 731

Re: Rebuild Compression

The standard test is to see if you can leave a cresent indentation in the copper by rolling your thumb nail into it .

And hats off to you sir,
A lot braver man that I and SWMBO lives 1300 km Away
by BSA_WM20
Fri Oct 30, 2020 12:37 pm
Forum: Tech
Topic: Rebuild Compression
Replies: 23
Views: 731

Re: Rebuild Compression

And while we are myth busting 1) wire brushing will not work harden the copper unless you are really laying into it hard enough to see flow lines starting to happen on the surface. 2) cleaning with steel wool will also not work harden the surface of the copper 3) chemical cleaning will also not affe...
by BSA_WM20
Fri Oct 30, 2020 12:26 pm
Forum: Tech
Topic: Rebuild Compression
Replies: 23
Views: 731

Re: Rebuild Compression

Oh, another thing, when you roasted the head gasket. Did you dunk the cherry red metal in a bucket of ice water to really soften up the copper? This is a furfy . Slow cooling , quenching makes absolutely no difference what so ever Lots of people like to dunk primarily to blast off the oxide layer w...
by BSA_WM20
Wed Oct 21, 2020 11:20 am
Forum: Tech
Topic: Ok..now its got me mad..spark plug
Replies: 11
Views: 636

Re: Ok..now its got me mad..spark plug

Try starving the engine off when you have finished for the day. I have a problem with the non- volatile fraction of what passes for fuel now days. That is the TARs that even a computer controlled fuel injected engine can not burn which is why we have after burners fitted to the exhaust , cunningly c...
by BSA_WM20
Fri Oct 09, 2020 12:09 pm
Forum: Tech
Topic: 1966 Bsa b44 enduro
Replies: 3
Views: 393

Re: 1966 Bsa b44 enduro

They would be the seat mounts for the dual seal not fitted to the enduro .
by BSA_WM20
Sat Sep 26, 2020 5:42 am
Forum: Tech
Topic: Rickman Framed B44
Replies: 11
Views: 803

Re: Rickman Framed B44

You are going to have trouble doing that freehand .
The heat in an arc is a lot harder to control than the heat in a gas flame
by BSA_WM20
Wed Sep 23, 2020 10:54 am
Forum: Tech
Topic: Chinese Carburetor
Replies: 4
Views: 452

Re: Chinese Carburetor

And to add my 2 bobs worth I fix small engines now days for a living Regularly I get a problem child into the workshop where the owners has fitted a mass of cheap parts they bought off evilbay or amazon. I have found carb with no air passage drillings , no float needes , no fuel hole, no vent hole n...
by BSA_WM20
Wed Sep 02, 2020 1:18 pm
Forum: Tech
Topic: B25SS exhaust pipe
Replies: 11
Views: 930

Re: B25SS exhaust pipe

HE makes custom pipes as well.
by BSA_WM20
Sat Aug 29, 2020 11:40 am
Forum: Tech
Topic: B25SS exhaust pipe
Replies: 11
Views: 930

Re: B25SS exhaust pipe

I'd agree with Jeff K and sympathise with the purchaser. Who ever is fabricating those pipes needs to invest in a 1/2" or more smaller center line radius tooling. Very easy pipe to make; would be good if they were made from 409 or 304 stainless or even titanium. Barry at Overlander makes all his pi...
by BSA_WM20
Sun Aug 23, 2020 10:29 am
Forum: Tech
Topic: Oil leak(s) b50
Replies: 11
Views: 925

Re: Oil leak(s) b50

Trevor I’ve had a search on eBay for bunn breather with no results do you have a link. Rex did a batch about 5 years ago and has not made another as he is no longer interested in motorcycling. The company was Carrel industries from memory If you want to buy the business from him then his address is...
by BSA_WM20
Thu Aug 20, 2020 9:41 am
Forum: Tech
Topic: Oil leak(s) b50
Replies: 11
Views: 925

Re: Oil leak(s) b50

I still have a Rex Bunn on my B50 with no leaking I wonder how Rex is going haven’t seen anything from him for a while. He has given up motorcycling all together and ended up selling all of his surplus stuff to Stuart Penhall . Stuarts son has been selling the cashe off on evilbay for a long while....
by BSA_WM20
Thu Aug 20, 2020 9:37 am
Forum: Tech
Topic: Oil leak(s) b50
Replies: 11
Views: 925

Re: Oil leak(s) b50

The O ring goes on the crankcase mouth Oil passes around the threads up the hole in the barrel for the stud to pass through then out from under the head bolts totally bypassing any gasket. You can spotface the head if you like and put a copper washer under the steel one and replace the nut with an a...
by BSA_WM20
Tue Aug 18, 2020 9:44 am
Forum: Tech
Topic: Oil leak(s) b50
Replies: 11
Views: 925

Re: Oil leak(s) b50

The usual fix is to put a slight countersink in the crankcase around the stud then an O ring to seal off the stud
It is crankcase fume being forced up the bolt hole.
If your name is Rex Bunn you now spend 5 years researching breathing and design a new crankcase breather system
by BSA_WM20
Sat Aug 01, 2020 12:52 pm
Forum: Tech
Topic: Speedometer Cable Lube?
Replies: 3
Views: 440

Re: Speedometer Cable Lube?

The only thing I lube any cable, throttle, clutch, brake or speedo is Tri-Lube dry cable lubricant . You get it from push bike shops being a British Bike rider you might need to take some smelling salts & a fried to help you recover when they tell you the price but a little goes a very Looooooog way...
by BSA_WM20
Wed Jun 03, 2020 9:52 am
Forum: Tech
Topic: B40 triple clamp material
Replies: 13
Views: 1695

Re: B40 triple clamp material

Well to keep it on / off topic.
THe A65L did around 150,000 miles without any problems from the wire mounted headlight.
The B 50 T used to eat a set every year or so .
by BSA_WM20
Sat May 16, 2020 9:09 am
Forum: Tech
Topic: Blown main fuse
Replies: 4
Views: 822

Re: Blown main fuse

I had this happen regularly on my B 50 T Seemed to be quite random . Ended up being the steel side cover having cut through the gromets managed to touch the neg terminal on the battery and poof, no more fuse . Took a long while to find it. The A 65 L had one of those idiot in line stop switches on t...
by BSA_WM20
Fri May 08, 2020 7:55 am
Forum: Tech
Topic: Electronic box mounts
Replies: 4
Views: 1016

Re: Electronic box mounts

Depending upon the price I will take a UK prepaid box full which from memory is about 1kg
Otherwise the freight gets silly
by BSA_WM20
Tue May 05, 2020 9:54 am
Forum: Off topic
Topic: Any part of the old BSA Company still around?
Replies: 3
Views: 1157

Re: Any part of the old BSA Company still around?

BSA had a lot of subsiduries that traded under their own name Churchill Engineering is still there as is Bertley Engineering. 'Jessops & Savelle steel both got sucked into the British Steel mergers under the Thatcher government and are now owned by one of the Indian conglomerates, can't remember the...
by BSA_WM20
Mon Apr 27, 2020 4:20 pm
Forum: Tech
Topic: 1969 oil tanks diferences
Replies: 6
Views: 1053

Re: 1969 oil tanks diferences

Kommando is once again correct.
The long neck will dig into your thigh if you like to ride with your knees in ( the proper way )
I rode a B40 GA for 15 years that has the long neck on it and had a perminent bruise from the filler cap
by BSA_WM20
Tue Apr 07, 2020 10:47 am
Forum: Project bikes
Topic: Converting a B50 to wet sump. (aka Boris Johnson)
Replies: 102
Views: 11956

Re: Converting a B50 to wet sump.

BSA gave up making wet sumps around 1936 from memory which the release of the new B group. They did this for very good reasons What do you imagine their reasoning was? Viscous drag for starters both on start up and while running. Remember your car has an external flywheel behind the crank & a small...
by BSA_WM20
Mon Apr 06, 2020 11:17 am
Forum: Project bikes
Topic: Converting a B50 to wet sump. (aka Boris Johnson)
Replies: 102
Views: 11956

Re: Converting a B50 to wet sump.

BSA gave up making wet sumps around 1936 from memory which the release of the new B group.
They did this for very good reasons
by BSA_WM20
Fri Apr 03, 2020 5:54 am
Forum: Parts & Bikes wanted
Topic: Brad Jones looking for B25T
Replies: 4
Views: 956

Re: Brad Jones looking for B25T

Wasn't thinking.
Should have deleted it & added it as jpeg so it can't be vacuumed up by web crawlers.
I wondered why we had not seen nor heard from him for a long while
by BSA_WM20
Thu Apr 02, 2020 3:37 am
Forum: Parts & Bikes wanted
Topic: Brad Jones looking for B25T
Replies: 4
Views: 956

Brad Jones looking for B25T

I don't normally cross post but Brad is having troubles loggin in here Looking for a complete oif B25 engine, preferably stamped up as a 'T' version. Could also be interested in a part complete engine depending on what was missing. Due to not being able to log into B50.org, if anyone can help I can ...
by BSA_WM20
Tue Mar 24, 2020 12:28 pm
Forum: Tech
Topic: Best Electronic Ignition
Replies: 23
Views: 3714

Re: Best Electronic Ignition

Trevor, can you post a link the Podtronics ignitions please. Paul. Now I'm curious. Why the dislike of the Electrex? You're the second or third person I've seen try to steer someone away from the Electrex unit. Why marry yourself to another magnetic pick up (assuming that's the route) wedged into t...
by BSA_WM20
Tue Mar 24, 2020 12:18 pm
Forum: Tech
Topic: Best Electronic Ignition
Replies: 23
Views: 3714

Re: Best Electronic Ignition

Trevor, can you post a link the Podtronics ignitions please. Paul. Now I'm curious. Why the dislike of the Electrex? You're the second or third person I've seen try to steer someone away from the Electrex unit. Why marry yourself to another magnetic pick up (assuming that's the route) wedged into t...
by BSA_WM20
Tue Mar 24, 2020 12:10 pm
Forum: Tech
Topic: Best Electronic Ignition
Replies: 23
Views: 3714

Re: Best Electronic Ignition

beesa71 wrote: Mon Mar 23, 2020 10:27 am Trevor, can you post a link the Podtronics ignitions please.

Paul.
http://www.jeperformance.biz/runintro12.htm

Actually it was Run tronics .
Had a brain fart yesterday
by BSA_WM20
Mon Mar 23, 2020 1:45 am
Forum: Tech
Topic: Best Electronic Ignition
Replies: 23
Views: 3714

Re: Best Electronic Ignition

The local VMX crowd are all running Runtronics ignitions which come in single & twin plug variants. Not a simple plug & play as they will require some setting up.17 hours run time from 5 C cells that will happily fit inside the primary chain case where the stator used to go , you will have to make u...
by BSA_WM20
Thu Mar 19, 2020 11:32 pm
Forum: Tech
Topic: B25 Oil circulation mod, why wouldn't this work?
Replies: 8
Views: 1622

Re: B25 Oil circulation mod, why wouldn't this work?

minetymenace wrote: Thu Mar 19, 2020 5:04 pm Good point, would it foam though?
IT depends upon the oil
Air cooled engine oils have more anti-foming agents in them than car oils.
Remembering that the scavenge is pretty foamy in the first place.
by BSA_WM20
Sun Mar 15, 2020 2:55 pm
Forum: Tech
Topic: TR5mx Carb Settings
Replies: 8
Views: 1431

Re: TR5mx Carb Settings

Probably the best explaination of concentrics on the web
http://www.jba.bc.ca/Bushmans%20Carb%20Tuning.html
by BSA_WM20
Fri Mar 13, 2020 1:37 pm
Forum: Tech
Topic: B40 Clutch Pressure Plate
Replies: 9
Views: 1672

Re: B40 Clutch Pressure Plate

Yes that is how the SRM unit works.
BSA Bill used to do a similar unit for 6 spring pressure plates with no thread.
I have fitted a few & they work a treat.
Of course on the preunit box you have adjustment at the pushrod where as there is none on the unit boxes.
by BSA_WM20
Thu Mar 12, 2020 9:51 am
Forum: Tech
Topic: B40 Clutch Pressure Plate
Replies: 9
Views: 1672

Re: B40 Clutch Pressure Plate

...assuming the adjuster thread is somewhere close.... You must have an original plate somewhere, does that lift square? Does not matter . I have fitted a lot of them where they did not fit With that plate the only important thing would be to machine the inside of the plate true to the outer circum...
by BSA_WM20
Wed Mar 11, 2020 12:05 pm
Forum: Tech
Topic: B40 Clutch Pressure Plate
Replies: 9
Views: 1672

Re: B40 Clutch Pressure Plate

You might like to get a radial roller bearing + lifting mushroom from SRM ( part of the Devimead clutch )
Install it in your new pressure plate so the plate "wants" to lift square from the get go.
by BSA_WM20
Mon Mar 09, 2020 1:43 pm
Forum: Tech
Topic: Maybe Off Topic
Replies: 3
Views: 1074

Re: Maybe Off Topic

The trick is how you support the frame so you can get a good shock loading onto the fork legs. I put a length of hard wood under the lower clamp plate if the engine is in the frame If not then I sit it on my offset vice. Some times I have needed to add some heat. This is on top of what Kommando post...
by BSA_WM20
Thu Feb 20, 2020 5:20 am
Forum: Tech
Topic: Mystery problem and BP is to blame!
Replies: 12
Views: 2547

Re: Mystery problem and BP is to blame!

The dye that goes in the fuel does not evaporate. The fuel does so as it gets staler it gets darker. It is designed to do this so those who are in the know can see it is ( or has ) gone off. Some times it gets pumped out & sent back for reprocessing other times the servo will do a discount till it i...
by BSA_WM20
Mon Feb 03, 2020 6:29 am
Forum: Tech
Topic: 1974 Gas tank on Ebay
Replies: 15
Views: 2398

Re: 1974 Gas tank on Ebay

kommando wrote: Sun Feb 02, 2020 4:25 pm Royal Choppers is one of the better Indian sellers who does not sell the rejects.
Would not go that far.
Know of a fair bit of duff stuff that has come from them.
However they do stand behind what the see.
So if it is wrong / badly damages / defective they will happily send a replacement
by BSA_WM20
Sat Feb 01, 2020 10:57 am
Forum: Tech
Topic: 1974 Gas tank on Ebay
Replies: 15
Views: 2398

Re: 1974 Gas tank on Ebay

Not in that condition
But when you don't know you look up "triumph tank" on ebay and get 22,000 tanks for sale around $ 500
So 500 is what it must be worth.
by BSA_WM20
Fri Jan 24, 2020 1:58 pm
Forum: Tech
Topic: B40/44 Regina primary chain issues...
Replies: 4
Views: 1203

Re: B40/44 Regina primary chain issues...

the new chain has rollers that a pooteenth bigger diameter so t runs tight
by BSA_WM20
Thu Jan 23, 2020 6:46 am
Forum: Tech
Topic: B44 Primary Breather Pipe
Replies: 8
Views: 1929

Re: B44 Primary Breather Pipe

Yep, No oil seal works really well. Don't forget to make a spacer if you remove it. Then a 1/4" hole is drilled at the correct oil level for the primary chain case. Once you have done this you need to be careful what engine oil you use. Definately not synthetic anything. Run the breather tube up the...