Search found 88 matches

by BasilF
Fri May 22, 2020 2:16 pm
Forum: Tech
Topic: pattern tricon switch
Replies: 11
Views: 348
Flag: Great Britain

Re: pattern tricon switch

Sounds like they used annealed copper to make the contacts. If you could remove the contacts and spend a few minutes taping them with a hammer you might give them enough springiness to work properly.
by BasilF
Tue May 19, 2020 11:24 am
Forum: Tech
Topic: Tyres
Replies: 10
Views: 244
Flag: Great Britain

Re: Tyres

I've put Dunlop K81/TT100 on mine as they were what I fitted in 1975 and they are still available.
by BasilF
Thu May 14, 2020 5:24 pm
Forum: Project bikes
Topic: B25 SS CV19 project
Replies: 41
Views: 1010
Flag: Great Britain

Re: B25 SS CV19 project

minetymenace wrote:
Thu May 14, 2020 5:11 pm
JerryT that tank has the brackets for the brace....
Jerry.

https://www.b50.org/phpBB2/viewtopic.php?f=14&t=5589. 28 August 2019
Well it would do. I did both tanks at the same time. I also have the brace which you can have if you want it.
by BasilF
Thu May 14, 2020 6:43 am
Forum: Parts & Bikes wanted
Topic: 1970 OIF B25 parts.
Replies: 6
Views: 363
Flag: Great Britain

Re: 1970 OIF B25 parts.

JerryT wrote:
Tue May 12, 2020 9:44 pm
83-2013. Swinging arm spindle. I have a loose snail cam.
A new snail cam is £7 from Draganfly.. Weld it on to the old spindle and send it for zinc plating when you have a batch to do. Should come out much cheaper than a new spindle.
by BasilF
Wed May 13, 2020 7:38 am
Forum: Project bikes
Topic: B25 SS CV19 project
Replies: 41
Views: 1010
Flag: Great Britain

Re: B25 SS CV19 project

Here is my Leightons repaired seat and the chuck I hacked off the seat base before recover. Whatever he did with the foam, it seems wide enough at the front.
IMG_20200513_073424.jpg
by BasilF
Fri May 08, 2020 10:52 pm
Forum: Project bikes
Topic: B25 SS CV19 project
Replies: 41
Views: 1010
Flag: Great Britain

Re: B25 SS CV19 project

Jerry,
R K Leighton is in Birmingham. My bank account shows I paid £144 while a new seat with a glass fibre base is £175 I think. The £144 included some welding on the base, new foam and a cover.
by BasilF
Fri May 08, 2020 3:46 pm
Forum: Project bikes
Topic: B25 SS CV19 project
Replies: 41
Views: 1010
Flag: Great Britain

Re: B25 SS CV19 project

I met Rupert Ratio at a bike show at the NEC. He said that for the large tanks the factory just cut an inch or so from the front of the seat pan. They also cut a similar slice out of the parallel section of the foam and then glued the halves together. I cut the front off mine before taking it to Lay...
by BasilF
Thu May 07, 2020 2:01 pm
Forum: Project bikes
Topic: B25 SS CV19 project
Replies: 41
Views: 1010
Flag: Great Britain

Re: B25 SS CV19 project

For the seat, R K Leighton. www.rk-leighton.co.uk did a briliant job on mine including getting the base welded and powder coated.
by BasilF
Thu May 07, 2020 6:44 am
Forum: Tech
Topic: Front Brake Plate ??'s
Replies: 1
Views: 194
Flag: Great Britain

Re: Front Brake Plate ??'s

Which brake? Twin leading shoe would become twin trailing shoe and work poorly. Small brake should work OK but make sure the torque anchor is in tension not compression.
by BasilF
Mon May 04, 2020 6:48 am
Forum: Project bikes
Topic: 74 TR5 MX Project For Ken
Replies: 44
Views: 2667
Flag: Great Britain

Re: 74 TR5 MX Project For Ken

Johnu,

Would be interested to hear about your pipe bending technique. I can see you hot bend, Do you fill with sand, bend round a former etc? All my attempts result in the tube flattening even when it doesn't buckle.
by BasilF
Sat May 02, 2020 4:46 pm
Forum: Tech
Topic: B50MX cam in a B25 and Big bore ideas.
Replies: 10
Views: 488
Flag: Great Britain

Re: B50MX cam in a B25 and Big bore ideas.

My B23 engine is on the bench at the moment. It looks like, without modification to the crankcase, you could machine the barrel out to take a 79mm od sleeve with a 75mm bore. giving about 313cc.
IMG_20200502_164419.jpg
IMG_20200502_164442.jpg
by BasilF
Sat May 02, 2020 11:03 am
Forum: Project bikes
Topic: My B50SS
Replies: 49
Views: 10697
Flag: Great Britain

Re: My B50SS

Perhaps slightly quieter than the original. Only ridden it in first and second gear down private road so don't know if top end performance is ok. Brakes seem terrible but I'll wait till I've run them in a bit before panicking.
by BasilF
Thu Apr 30, 2020 4:21 pm
Forum: Project bikes
Topic: My B50SS
Replies: 49
Views: 10697
Flag: Great Britain

Re: My B50SS

IMG_20200420_120203.jpg IMG_20200418_123352.jpg IMG_20200430_160601.jpg IMG_20200424_122852.jpg IMG_20200430_153159.jpg Lozenge silencer using one of Jerry's cases. bend in outlet pipe flattened in spite of packing with sand and heating to dull red. Nice heat shield is one is Jerry's. I think the b...
by BasilF
Thu Apr 30, 2020 3:45 pm
Forum: Tech
Topic: B25 piston
Replies: 15
Views: 604
Flag: Great Britain

Re: B25 piston

IMG_20200430_151747.jpg
16945 is the part number, 413 is the material, don't know what 1B74 or G1 are. My cheap Vernier calipers won't give an accurate diameter of the bore or piston (anything from 67 to 67.5.)
by BasilF
Wed Apr 29, 2020 10:45 pm
Forum: Tech
Topic: B25 piston
Replies: 15
Views: 604
Flag: Great Britain

Re: B25 piston

Thanks for the replies. The issue at the moment is if I decide to fit new rings then where do I get them from. Also the bore seems to be 10 thou over size while standard BSAs are 20, 40 and 60. Searching through the web it seems there are several vendors offering Hepolite pistons for B25s and the ri...
by BasilF
Wed Apr 29, 2020 4:56 pm
Forum: Tech
Topic: B25 piston
Replies: 15
Views: 604
Flag: Great Britain

B25 piston

IMG_20200429_162626.jpg
IMG_20200429_162633.jpg
Is this the standard piston for a 1971 B25? None of the illustrations I can find show a split skirt. There appears to be no markings for front and back. There is also a small witness mark on the crown where the sparkplug may have been touching it.
by BasilF
Sun Apr 26, 2020 11:00 am
Forum: Tech
Topic: B50 Frame number picture
Replies: 2
Views: 246
Flag: Great Britain

Re: B50 Frame number picture

IMG_20200329_154553.jpg
Not that visible on photo after powder coating. I have a better one that was taken when the frame was stripped.
by BasilF
Sat Apr 25, 2020 6:20 pm
Forum: Tech
Topic: Zener diode
Replies: 18
Views: 540
Flag: Great Britain

Re: Zener diode

Voltage regulators are available from Draganfly, Burton bike bits and several eBay vendors. If your alternator has two wires then you want the single phase, 120 watts model although the slightly more expensive 200watt one won't do any harm. I've got a 40 year old zener diode in my junk box which che...
by BasilF
Thu Apr 16, 2020 1:08 pm
Forum: Parts & Bikes wanted
Topic: breather pipe
Replies: 8
Views: 328
Flag: Great Britain

Re: breather pipe

Mine is a press fit into the chain case. We're the later ones threaded into the case?.
The answer might be to find someone locally with a lathe. Not a difficult part to make.
by BasilF
Wed Apr 15, 2020 10:48 pm
Forum: Parts & Bikes wanted
Topic: breather pipe
Replies: 8
Views: 328
Flag: Great Britain

Re: breather pipe

I bought a metre of this from Ebay. Fitted fine but unfortunately not available in grey. Size was 13mm id 18mm od. https://www.ebay.co.uk/itm/1-Metre-Silicone-Rubber-Vacuum-Hose-Turbo-Radiator-Coolant-Vac-Silicon-Tubing-UK/140665187714?ssPageName=STRK%3AMEBIDX%3AIT&var=440036540610&_trksid=p2057872....
by BasilF
Tue Apr 07, 2020 6:36 pm
Forum: Tech
Topic: Welding to oil tank.
Replies: 1
Views: 251
Flag: Great Britain

Re: Welding to oil tank.

Tacked the first side on and nothing caught fire.
IMG_20200407_181718.jpg
by BasilF
Tue Apr 07, 2020 4:36 pm
Forum: Tech
Topic: Welding to oil tank.
Replies: 1
Views: 251
Flag: Great Britain

Welding to oil tank.

Just starting new project and the first job is to weld new brackets for the front electrical box mounts. These are welded to a frame tube that is part of the oil tank. Oil is drained but tank not cleaned out. Will I have problems with smoke/fire or will I get away with it?
by BasilF
Mon Apr 06, 2020 5:32 pm
Forum: Tech
Topic: Front Brake Stay/Fork?
Replies: 19
Views: 758
Flag: Great Britain

Re: Front Brake Stay/Fork?

Part number 20-0104
by BasilF
Mon Apr 06, 2020 10:22 am
Forum: Tech
Topic: Front Brake Stay/Fork?
Replies: 19
Views: 758
Flag: Great Britain

Re: Front Brake Stay/Fork?

:smile: I think your mount has been cut off by an SS owner. I did that with mine. Still have the bit. perhaps you could evostick it on.
IMG_20200406_101456.jpg
by BasilF
Sun Apr 05, 2020 6:46 am
Forum: Tech
Topic: Front Brake Stay/Fork?
Replies: 19
Views: 758
Flag: Great Britain

Re: Front Brake Stay/Fork?

The right side slider should look like this.
fork.jpg
The upper attachment is for the 6inch brake and the lower is for the 8inch brake.
by BasilF
Sun Mar 29, 2020 6:20 am
Forum: Project bikes
Topic: My B50SS
Replies: 49
Views: 10697
Flag: Great Britain

Re: My B50SS

Sorted. Forgot to buy a final drive chain >44
by BasilF
Sat Mar 28, 2020 5:45 pm
Forum: Project bikes
Topic: My B50SS
Replies: 49
Views: 10697
Flag: Great Britain

Re: My B50SS

Looking at the first picture in this thread, the bike now looks good but I'm wearing the same jacket and I've lost a lot of hair. The bike started for the first time today and seem to run well. This was especially gratifying as it had the same spark plug it came with. Still a few jobs to do. Strobe ...
by BasilF
Sat Feb 22, 2020 12:16 pm
Forum: Parts & Bikes wanted
Topic: 1971 BSA B25ss Centre Stand Wanted
Replies: 5
Views: 633
Flag: Great Britain

Re: 1971 BSA B25ss Centre Stand Wanted

Search Ebay for 83-2627 and the matching bolts and spring. If you don't have machining facilities then it would work OK by just cutting off the foot lever (or maybe leaving it and don't use the side stand).
by BasilF
Thu Feb 13, 2020 7:20 pm
Forum: Project bikes
Topic: Lozenge silencer
Replies: 16
Views: 1358
Flag: Great Britain

Re: Lozenge silencer

Silencer looks great Jerry. Looking forward to seeing you when I get home.
by BasilF
Sun Feb 09, 2020 5:15 pm
Forum: Project bikes
Topic: My B50SS
Replies: 49
Views: 10697
Flag: Great Britain

Re: My B50SS

B50front.jpg Only this one. I'm on holiday till end Feb so not working on it at present. Still got exhaust and petrol pipes to go. Connected all oil pipes and filled frame and it dripped oil but I thinks that's just an oil pipe not pushed on to the fitting under the engine properly. Good spark when...
by BasilF
Wed Jan 29, 2020 2:11 pm
Forum: Tech
Topic: grey color
Replies: 6
Views: 865
Flag: Great Britain

Re: grey color

Mine were done in Halfords rattle cans. Etch primer followed by alluminium paint followed by clear coat. Looked a good match for the originals.
IMG_20180912_114444.jpg
by BasilF
Sat Dec 21, 2019 11:30 pm
Forum: Project bikes
Topic: My B50SS
Replies: 49
Views: 10697
Flag: Great Britain

Re: My B50SS

Engine ready to be installed in the frame. They haven't been together for almost 6 years. engine.jpg However I noticed that when bolting the first crankcase half into the engine stand I had put the bolt in the wrong way and I couldn't get the engine out of the stand without cutting the bolt head off...
by BasilF
Thu Dec 12, 2019 5:46 pm
Forum: Tech
Topic: Fitting Allen screws to rocker box on B50.
Replies: 27
Views: 2879
Flag: Great Britain

Re: Fitting Allen screws to rocker box on B50.

Without digging out my drawing what are the reference S holes? They are the ones for the head steady. If they are helicoiling the outer holes why not those? They take more stress than the outer holes. John Having my head and rocker box on the bench now I can say that those holes have dowels in them...
by BasilF
Tue Dec 10, 2019 9:05 am
Forum: Tech
Topic: Lozenge silencer
Replies: 7
Views: 1165
Flag: Great Britain

Re: Lozenge silencer

The everlasting lozenge thread misses the key information on how you get from a folded channel to a nicely rounded lozenge. There is some serious panel beating skill required there.
by BasilF
Sun Dec 08, 2019 7:42 am
Forum: Tech
Topic: Fitting Allen screws to rocker box on B50.
Replies: 27
Views: 2879
Flag: Great Britain

Re: Fitting Allen screws to rocker box on B50.

Good point Skippy. The threads are sound and I can easily remove the head with bolts holding the rocker box so I'll save myself the cost of helicoils until I need them.

It can be hard to maintain a balanced view during a restoration. Who said "perfection is the enemy of progress".
by BasilF
Sat Dec 07, 2019 4:21 pm
Forum: Tech
Topic: Fitting Allen screws to rocker box on B50.
Replies: 27
Views: 2879
Flag: Great Britain

Re: Fitting Allen screws to rocker box on B50.

Thanks John. I think you are right. I did a few sums which suggest that a UNF helicoil would still be weaker than a UNC thread straight in the aluminium so I'll use UNC helicoils. I might also use hex bolts instead of Allen screws.
by BasilF
Fri Dec 06, 2019 6:36 pm
Forum: Tech
Topic: Fitting Allen screws to rocker box on B50.
Replies: 27
Views: 2879
Flag: Great Britain

Re: Fitting Allen screws to rocker box on B50.

The UNF/UNC issue isn't about what is originally there. The fine UNF thread will be better at pulling down the rocker box but what is the thread profile of the outside of a UNF helicoil compared with a UNC helicoil and will a UNF helicoil take the load without stripping the cylinder head? I suppose ...
by BasilF
Fri Dec 06, 2019 12:39 am
Forum: Tech
Topic: Fitting Allen screws to rocker box on B50.
Replies: 27
Views: 2879
Flag: Great Britain

Fitting Allen screws to rocker box on B50.

I want to fit allen screws to my rocker box so I can remove the head and rocker box while the engine is in the frame. My questions are; 1: Should I use UNC or UNF helicoils? UNF will pull the box down better and are the helicoil (external) threads equally suitable for aluminium. 2: How do you mount ...
by BasilF
Wed Nov 06, 2019 8:33 am
Forum: Project bikes
Topic: The Everlasting Lozenge.
Replies: 29
Views: 8194
Flag: Great Britain

Re: The Everlasting Lozenge.

Or if you don't fancy making any more could you post a tutorial on the panel beating stages to get the lozenge shape? I'm desperate enough to try and make one as the two I had to fit to my B50 have turned out to be rusty wrecks and Burton bike bits don't have any new ones.

Basil
by BasilF
Sun Nov 03, 2019 7:12 pm
Forum: Project bikes
Topic: My B50SS
Replies: 49
Views: 10697
Flag: Great Britain

Re: My B50SS

Box revised so electronic ignition is on it's own heat sink. <214
Boxrevised2.jpg
Boxrevised1.jpg