Search found 341 matches

by crankbuster
Tue Jul 21, 2020 5:59 am
Forum: Tech
Topic: B44 clutch operating rack
Replies: 4
Views: 632

Re: B44 clutch operating rack

I worry that the correct smaller ball can drop out during clutch adjustment or cable changing.
https://youtu.be/9i9AJCpMmvs
by crankbuster
Mon Jul 20, 2020 6:50 pm
Forum: Tech
Topic: B44 clutch operating rack
Replies: 4
Views: 632

Re: B44 clutch operating rack

The lever unscrews from the pinion left hand thread!
by crankbuster
Fri Jul 17, 2020 3:07 pm
Forum: Tech
Topic: Thread : BSC vs BA ?
Replies: 10
Views: 1210

Re: Thread : BSC vs BA ?

I think that 2BA and 3/16 BSC are interhangeable.
Certainly BSA & Triumph did, if you compare the B25 with the TR25 parts books. You see that the threaded rocker spindles (with the same part number) can use both, BSA BA, Triumph BSC:
BSCBA.jpg
by crankbuster
Fri Jul 10, 2020 2:39 pm
Forum: Tech
Topic: B25SS Rocker Box Studs
Replies: 10
Views: 1286

Re: B25SS Rocker Box Studs

With acknowledgement to Steve at SRS Publishing:
They were a number of changes to the head studs:
Headstuds.jpg
by crankbuster
Thu Jul 09, 2020 7:25 pm
Forum: Tech
Topic: B25SS Rocker Box Studs
Replies: 10
Views: 1286

Re: B25SS Rocker Box Studs

Not that it matters too much these days, but it was actually the studs in the dowel positions that were stronger steel.
Here is my rockerbox video, Starfire not SS though
https://youtu.be/kws1ISPPMBY

I think the stud lengths are given OK in the Parts list, but not the workshop manual.
by crankbuster
Wed Jun 24, 2020 11:42 am
Forum: Tales Of Woe
Topic: >mead tomkinson
Replies: 57
Views: 19148

Re: >mead tomkinson

:laugh I think most of them rejects could spell it though Minety! :grin:
by crankbuster
Sun Jun 14, 2020 11:01 am
Forum: Tech
Topic: A kicker that actually folds away?
Replies: 23
Views: 2910

Re: A kicker that actually folds away?

It's the P92 one, similar to the T160, but the spring and ball is in the lever rather than in the boss.
by crankbuster
Sat Jun 13, 2020 10:30 am
Forum: Tech
Topic: A kicker that actually folds away?
Replies: 23
Views: 2910

Re: A kicker that actually folds away?

You can see the BSA designed folding kicker in my video here:
[youtube]https://youtu.be/Kku3lMXYnwU[/youtube]
by crankbuster
Tue Jun 09, 2020 6:00 pm
Forum: Off topic
Topic: Lock down projects
Replies: 34
Views: 3723

Re: Lock down projects

1. Just got bored.
2. Because I can (now)
3. Reflection is from a factory photo belonging to the University of Birmingham, (Creative Commons License)
Interested to see if I could model a thread that would print and be functional, so I was surprised that it fits:
DrainPugIn.jpg
by crankbuster
Tue Jun 09, 2020 1:53 pm
Forum: Off topic
Topic: Lock down projects
Replies: 34
Views: 3723

Re: Lock down projects

Lockdown project: Tank draining through the carb: 3D metal printed threads
DrainValve.jpg
DrainValveReal.jpg
by crankbuster
Fri May 22, 2020 3:47 pm
Forum: Tech
Topic: pattern tricon switch
Replies: 11
Views: 1459

Re: pattern tricon switch

Ah, that's it, I think that the Wipac used Beryllium Copper, more expensive.
by crankbuster
Fri May 22, 2020 7:57 am
Forum: Tech
Topic: pattern tricon switch
Replies: 11
Views: 1459

Re: pattern tricon switch

Interesting, you have put a pin through the unused terminal position. The Triconsol switch used these extra terminals for the electric start button. I would like to understand what is different in the pattern switch. Is the contact a different shape, or is the plastic boss missing? Can’t see how, in...
by crankbuster
Thu May 21, 2020 8:57 am
Forum: Tech
Topic: pattern tricon switch
Replies: 11
Views: 1459

Re: pattern tricon switch

TriconContacts.png
Wipac tricon contact arrangement
by crankbuster
Fri May 01, 2020 12:42 pm
Forum: Tech
Topic: B25 piston
Replies: 15
Views: 2106

Re: B25 piston

Here's three common ones:
pistons.jpg
by crankbuster
Fri May 01, 2020 11:49 am
Forum: Tech
Topic: Leak back,
Replies: 20
Views: 2668

Re: Leak back,

Here are the BSA pump dimensions
OILpUMP.jpg
I don't have the tolerances for the .375 but you can see that the extra length means it does not need to be so close
by crankbuster
Fri Apr 03, 2020 3:35 pm
Forum: Tech
Topic: Another question about speedometers
Replies: 17
Views: 2614

Re: Another question about speedometers

They're not cheap, and I haven't needed those myself so you will be testing!
I think that the reset knob metal and plastic can still be obtained as a spare, but there are some the wrong length.
by crankbuster
Fri Apr 03, 2020 10:03 am
Forum: Tech
Topic: Another question about speedometers
Replies: 17
Views: 2614

Re: Another question about speedometers

I have successfully 3D printed some of the internal plastic parts because I could not find a supplier.
If you want to try, I have put the Reset knob and Trip pinion on Shapeways: https://www.shapeways.com/shops/bsa3d?sort=newest
by crankbuster
Sun Oct 06, 2019 7:13 pm
Forum: Tech
Topic: Head gasket
Replies: 10
Views: 2528

Re: Head gasket

Tdc plug sçrews into the bolt hole on the drive side, and locates in the crank. The timing side takes the (optional) tacho drive and is in the inner timing cover (not the crank case). Best not get these mixed up! As above, don't trust the alternator timing marks until checked. I think the Tacho fit...
by crankbuster
Tue Jun 04, 2019 10:53 pm
Forum: Tech
Topic: Head stock/steering stem sizes
Replies: 3
Views: 1801

Re: Head stock/steering stem sizes

mm
Headstock.jpg
by crankbuster
Fri May 11, 2018 10:24 pm
Forum: Tech
Topic: Help with forks please!
Replies: 19
Views: 6203

Re: Help with forks please!

OK, I suggest that you put the leg back in the yokes and refit the spring and top nut. Forget about the tool and see if the spring pressure will override any damaged threads and allow the bolt to unscrew. If that fails, you need to loose the head of the bolt. Remove the leg and take out the spring. ...
by crankbuster
Fri May 11, 2018 8:47 pm
Forum: Tech
Topic: Help with forks please!
Replies: 19
Views: 6203

Re: Help with forks please!

In your first post you say
"Whole lower leg rotates round and the special tool at the top."
You know the tool must not rotate when you undo the bolt?
by crankbuster
Thu May 10, 2018 10:21 pm
Forum: Tech
Topic: Help with forks please!
Replies: 19
Views: 6203

Re: Help with forks please!

It doesn't matter that the lower leg rotates so long as the inside is held the bolt will unscrew .
You can see the slot that the tool engages with here https://youtu.be/ZfVUVx9P_CM
by crankbuster
Fri Apr 27, 2018 6:06 pm
Forum: Tech
Topic: B44VS Rear Crinkle Hub Rebuild
Replies: 6
Views: 2535

Re: B44VS Rear Crinkle Hub Rebuild

Hi,
That sounds about right.
Bike Looks Good too, enjoy!
Crinkle.JPG
by crankbuster
Thu Apr 26, 2018 10:52 pm
Forum: Tech
Topic: B44VS Rear Crinkle Hub Rebuild
Replies: 6
Views: 2535

Re: B44VS Rear Crinkle Hub Rebuild

1 no side play
2 approximately flush
Maybe this will help
https://youtu.be/kQK2YAD5OCQ
by crankbuster
Mon Mar 26, 2018 7:55 pm
Forum: Tech
Topic: Sealing washer for carb banjo
Replies: 3
Views: 1724

Re: Sealing washer for carb banjo

The washer is shown in the P34 drawings (courtesy to SRS publishing)
BsaCarb.JPG
For the B25 1971, it makes it into the parts list, but is not illustrated:
1971B25.JPG
In the Fury parts list it is finally shown in the diagram as well.
Furycarb.JPG
by crankbuster
Sun Mar 25, 2018 2:31 pm
Forum: Tech
Topic: Sealing washer for carb banjo
Replies: 3
Views: 1724

Re: Sealing washer for carb banjo

The mk 1 has always had a washer under the bolt head . The banjo itself seals against the flange (plastic) of the filter.
https://youtu.be/zRiKd7SbEXc
by crankbuster
Wed Oct 11, 2017 10:39 pm
Forum: Tech
Topic: B25 won't start
Replies: 17
Views: 4554

Re: B25 won't start

Most accurate fully advanced position
http://b50.org/phpBB2/download/file.php?id=5056
by crankbuster
Tue Oct 03, 2017 11:11 pm
Forum: Videos
Topic: Tail lamp
Replies: 0
Views: 3027

Tail lamp

by crankbuster
Fri Sep 08, 2017 12:53 pm
Forum: Videos
Topic: Headlamp
Replies: 2
Views: 1871

Re: Headlamp

No, the ammeter's fine, the trouble is not enough RAM .
(Rendering with ray tracing )
by crankbuster
Fri Sep 08, 2017 8:48 am
Forum: Videos
Topic: Headlamp
Replies: 2
Views: 1871

Headlamp

Headlamp assembly video:

https://youtu.be/JF1zUCxmxNc


Think my pilot bulb has blown
Render1.jpg
by crankbuster
Wed Mar 22, 2017 12:14 am
Forum: This Forum
Topic: BSA B25/TRIUMPH T25T
Replies: 7
Views: 3117

Re: BSA B25/TRIUMPH T25T

1971 Rockerboxes have larger studs, otherwise 68 to 70 are the same. 67 has the decompressor

https://youtu.be/6t32S9rLAfI
by crankbuster
Sat Mar 11, 2017 9:22 am
Forum: Tech
Topic: Electric Start
Replies: 635
Views: 165611

Re: Electric Start

Z4 Z5 aXLE.JPG
by crankbuster
Wed Mar 08, 2017 2:28 pm
Forum: Tech
Topic: Electric Start
Replies: 635
Views: 165611

Re: Electric Start

The 20 mm on Beats sketch is made up of the 5mm gap plus the width over the two sprockets which may not be 20
by crankbuster
Wed Mar 08, 2017 7:15 am
Forum: Tech
Topic: Electric Start
Replies: 635
Views: 165611

Re: Electric Start

Check it carefully because it is not the same as your sketch 1.5 is 1.0 mm, the sprocket width is designed by BSA not by Beat
by crankbuster
Tue Mar 07, 2017 8:28 pm
Forum: Tech
Topic: Electric Start
Replies: 635
Views: 165611

Re: Electric Start

Sprocket.JPG
by crankbuster
Mon Mar 06, 2017 9:59 pm
Forum: Tech
Topic: Electric Start
Replies: 635
Views: 165611

Re: Electric Start

by crankbuster
Sat Mar 04, 2017 11:22 pm
Forum: Tech
Topic: Electric Start
Replies: 635
Views: 165611

Re: Electric Start

new clutch Basket..
Basket.JPG
by crankbuster
Sat Mar 04, 2017 11:31 am
Forum: Tech
Topic: Electric Start
Replies: 635
Views: 165611

Re: Electric Start

Do you need the recess on the front of the gear? The alternator rotor and stator are flush. The rotor abuts the boss on the front. The chain line I have means that I cannot get the gear z2 to clear the basket and chain without the starter clashing with the crankcase. Sprocket.JPG sideview.JPG Sectio...
by crankbuster
Thu Mar 02, 2017 9:09 pm
Forum: Tech
Topic: Electric Start
Replies: 635
Views: 165611

Re: Electric Start

SideView.JPG