Search found 68 matches

by bsamxer
Mon Feb 26, 2007 7:42 pm
Forum: News
Topic: Works B50 at Work
Replies: 4
Views: 1019

I think you will find it's a 20" front wheel, one size for mx and trials
Paul.
by bsamxer
Sun Feb 11, 2007 10:31 am
Forum: Project bikes
Topic: It sparks
Replies: 192
Views: 32649

Beat, many years ago I tried a 6 volt system on a cheney B50, nice small coil light wieght battery from a modellers shop, still with points and condenser, advance controlled with the standard bob wieghts. I played around with the advance with different backing plates, weights and springs. BSA made s...
by bsamxer
Mon Dec 18, 2006 9:03 am
Forum: Tech
Topic: Reynolds 531 frame?
Replies: 22
Views: 4587

good post dvaliket are you going to follow up and speak to mike, it would be nice to get the info direct from the horses mouth instead of second hand with somebody's else's take on the history of these machines. a lot of the frames I've handled over the years have had brazing or bronze welding that ...
by bsamxer
Sun Dec 17, 2006 8:57 am
Forum: Tech
Topic: Reynolds 531 frame?
Replies: 22
Views: 4587

Mike eatough was making frames way before his tie up with ccm, over the years i've had or seen many frames like this one and quite a few frames escaped from the competition shop at bsa. the first batch of clews stroka's used a similar frame to this one and they were ex comp department frames. last I...
by bsamxer
Wed Dec 13, 2006 8:55 am
Forum: Tech
Topic: Reynolds 531 frame?
Replies: 22
Views: 4587

My feeling is this is one of mike Eathough's early frames, which he copied from the 70 works frame. he usally stamped his frames with cmpu followed by 3 no's. it's definatly not a Cheney but could be a works frame.
the photo's I placed on the site of my B50 MX has a similar frame.
Paul.
by bsamxer
Sun Oct 08, 2006 11:00 am
Forum: Int BSA Rally and other meetings
Topic: Forum meet 2007
Replies: 5
Views: 2541

Still a long way off but these things have a way of creeping up on you.
8/7/ 2007 the 44th international B.S.A. Rally at the klein strand, Jabbeke.
It's only ten minutes away from where I live so I guess I'm the closest.
Any body else going?
Paul.
by bsamxer
Sat May 20, 2006 12:49 pm
Forum: News
Topic: UK Forum Members Meeting 2006
Replies: 69
Views: 23335

Is the 1st and 2nd of july the date for farleigh, I take it the sun is the mx race day?
nice to see you have your piority's right Rickard, your wife should always come first!!
Paul.
by bsamxer
Tue Jan 24, 2006 6:37 am
Forum: Tech
Topic: CCM Stroka/ B50 side panels
Replies: 7
Views: 1744

Mark, the panels I have came off one of the origional stroka's which had one of the ex works frames, I think the 73 frames are the same geometry as the B50, they did fit on another frame I had which was stamped with eatough's numbers so they possibly will fit.
Paul.
by bsamxer
Mon Jan 23, 2006 6:41 pm
Forum: Tech
Topic: CCM Stroka/ B50 side panels
Replies: 7
Views: 1744

No Peter these are not the ones I want to copie, I'll get some photo's and post, there a lot neater than that.
Paul.
by bsamxer
Sun Jan 22, 2006 6:03 pm
Forum: Tech
Topic: CCM Stroka/ B50 side panels
Replies: 7
Views: 1744

CCM Stroka/ B50 side panels

Is there anybody supplying stroka/ B50 side panels. I have an origional pair and I've met a guy here in Belgium who specializes in motor cycle moldings and can makes small batches at good prices, the origionals are in fibreglass and thick. If there's no source for them at the moment I'll have them c...
by bsamxer
Mon Jan 02, 2006 9:33 am
Forum: Tech
Topic: Unit single electric Blower what kind of thrust for 30mm?
Replies: 8
Views: 1620

Nice idea, but you better consider a small computor to control all the sensors you need to get the mixture right thro the range. even with an air scoop you will hit problems with weak mixture. super charging works fine for drag racing over short distances, why not try nitros injection for that exra ...
by bsamxer
Thu Nov 10, 2005 8:15 am
Forum: News
Topic: Where Stan has been
Replies: 7
Views: 1565

Never do it again Stan, well not untill the next time eh? it's like asking a mountaineer why he climb's up mountain's, ans, because it,s there. now you can enjoy the fruit's of your work.BTW being a Chevy man, how in god's name do you get too the rear bank's spark plug's on a 3.8 transport I've trie...
by bsamxer
Tue Oct 11, 2005 7:59 pm
Forum: Off topic
Topic: Chronic Pinking!!
Replies: 7
Views: 1937

Eric Cheney developed one for the british forces, the idea behind it was so they could use one fuel in all modes of transport. they gave him an engine and he built the bike around it. don't know what happened to it, the project was for evaluation for eventual production. Simon will know the full sto...
by bsamxer
Thu Sep 22, 2005 9:32 am
Forum: Tech
Topic: Which Oil ?
Replies: 50
Views: 15841

It seems to me we are mulling over problems of the different uses of these machines. For motocross I would always use castol 'r', it's high temp protection in short duration races in mud splattered engines has been proven. for fast road work I prefer synthetic, but as with 'r' if you need it in the ...
by bsamxer
Sun Jul 24, 2005 7:40 am
Forum: Tech
Topic: New, Starting, Ignition, Boyer
Replies: 17
Views: 4838

Hi Greg, thank's for the pics, they are the B50 alloy crown's with the comp shop drilling. I have a pair identical to these. I've had a few different works bikes, one with the GP 71 3, The earlier one's had cde codes. [competition department experimental] another 71 bike with UME 003, I put that one...
by bsamxer
Sun Jul 24, 2005 5:46 am
Forum: Tech
Topic: New, Starting, Ignition, Boyer
Replies: 17
Views: 4838

Hi Greg, Do you have some recent photo's of the bike, both sides ,that you can post. A very interesting machine, looks like it has steel fork crowns as opposed to b50 alloy ones, the competition shop used to drill them full of holes to lighten them. they had better ofset and were stiffer,less flexin...
by bsamxer
Sat Jul 02, 2005 5:07 pm
Forum: Tech
Topic: New member
Replies: 10
Views: 2026

It's not just the fork's, It's the complete front end, mag bottoms, mag front wheel, ti spindle and chrome moly staunchions with lightened B50 head crowns and alloy top nuts. if they are available I'll let you know.
Paul.
by bsamxer
Sat Jul 02, 2005 11:26 am
Forum: Tech
Topic: New member
Replies: 10
Views: 2026

Well at least you still have the origional rear wheel, the frame will be one of mike eathough's which he produced for clew's, they had engine side covers stamped clew's, some had mag clyinder's and heads I had one that was 88 bore 100 stroke, that was a real stroka. they were a update of the last wo...
by bsamxer
Sat Jul 02, 2005 6:42 am
Forum: Tech
Topic: New member
Replies: 10
Views: 2026

Hi Stphen, your lucky to of found a stroka, normally it should have a magnesium back wheel hub and the frame should be the work's one with the cut out on the head stock. the cam is possibly the work's cam that Clews got from the race shop. the engines were std B50 modified by alan clews. I've never ...
by bsamxer
Sun Jun 05, 2005 7:59 pm
Forum: Tech
Topic: Mead & tomkinson b50 racers.
Replies: 17
Views: 4347

Hi Ivan, I take it from your figures that you made all measurements at 15 thou as your figures for the std mx cam are as per the book. the figures you give for the cam give an inlet duration of 327 degree's and an exhaust duration of 304 degree's. the overlap comes out at 115 degree's which is simil...
by bsamxer
Wed May 25, 2005 8:17 pm
Forum: News
Topic: Forum Members Meeting UK
Replies: 62
Views: 19625

Not a very safe bet, I think Belgium qualifies as another country.
I'll travell miles to see you get your money out.
Paul.
by bsamxer
Sat May 07, 2005 1:31 pm
Forum: Tech
Topic: The Power of the Zorsts
Replies: 14
Views: 2604

The pipe Cheney used on John Banks G.P. bike was a great improvement
it came out in one smooth curve,turning to the other side of the engine.
Eric rated it for better power, no nasty turn's and twists like the std B50
pipe and no need for a mega. but he did say the length was critical.
Paul.
by bsamxer
Sat Apr 23, 2005 6:58 pm
Forum: Tech
Topic: splitting inner timing cover
Replies: 5
Views: 1237

Gary, I've got a couple of gearbox outer covers that have been cut from the rest of the case, then it's just a case of a covering up the points/magnetic pickup. I've seen this set up a few times but I didn't think it looked that good.I saw an early CCM case that had the gearbox cover cut seperate to...
by bsamxer
Mon Apr 18, 2005 6:35 am
Forum: Tech
Topic: Camshafts for B40
Replies: 11
Views: 2302

Hi Flowrite,
By an MX cam do you mean a victor small/large journal cam?
What changes if any did you need to make to the cases to clear the larger dia base cirle/cam lobes/higher lift. which followers did you use.
gunnag's looking to do the same so any info would be helpfull.
Paul.
by bsamxer
Sat Apr 02, 2005 1:15 pm
Forum: Tech
Topic: New Guy with 1972 B50SS
Replies: 13
Views: 2928

These very angry poisonous snakes are they the brown snake or the black snake variety. Ive heard tell that the brown snake is so called because it's brown and the black snake because it's black, but the black snake is much more deadly. things are much less complicated in your part of the world. pers...
by bsamxer
Sun Mar 20, 2005 9:58 am
Forum: Tech
Topic: Valves & Guides
Replies: 7
Views: 1528

Stan, do kiddlewhite manufacture ti tulip valve's for the B50 in the standard length or would they do a batch, checking thier on line cataloge
I couldn't see any B50 stuff only A65.
Paul.
by bsamxer
Mon Mar 14, 2005 4:13 pm
Forum: Tech
Topic: Rocker Caps
Replies: 29
Views: 4769

Stan, my dad used to say 'you can lead a horse to water, but a pencil must be lead' It makes sense to me!
Paul.
by bsamxer
Mon Mar 14, 2005 3:23 pm
Forum: Tech
Topic: Mead & tomkinson b50 racers.
Replies: 17
Views: 4347

Rickard, the MX cam is not so bad as you have found out with your drag racing, but improvements can be made. normally the megacycle cams are better Maybe they had selected the wrong cam for their needs or not set it up properly, who knows. the mx cam is very vesatile, it can be used for many differe...
by bsamxer
Sun Mar 13, 2005 2:40 pm
Forum: Tech
Topic: Rocker Caps
Replies: 29
Views: 4769

Problem is the oils busy trying to get into the cam chamber so safer to pull it out via the rocker cap as you say. check out http://www.thinkauto.com they make some nice small one way valves. and your right this forum is about B50's from all walks of life not just about racing, some poeple forget b5...
by bsamxer
Sun Mar 13, 2005 2:25 pm
Forum: Tech
Topic: Rocker Caps
Replies: 29
Views: 4769

Looks neat and compact, can anything be done to eliminate the large square lump on top, an allen key socket perhaps. reminds me of the weight on top of a pressure cooker
Paul.
by bsamxer
Sun Mar 13, 2005 2:05 pm
Forum: Tech
Topic: Rocker Caps
Replies: 29
Views: 4769

Canberra,Stan's right on this one, if as you say you join the two pipes together then the valve, you will also get air transfered from the one to the other. the only option is to fit a seperate valve to your rocker box Pipe to eliminate all pressure in crankcase and rocker chamber. That cat wasn't n...
by bsamxer
Sun Mar 13, 2005 10:30 am
Forum: Tech
Topic: Mead & tomkinson b50 racers.
Replies: 17
Views: 4347

Bill, by a std head I meant one set of flow rates to compare different cams by. I have posted measurements of the cams I use elsewhere on the forum and if we had figures for all the different cams that are on offer at the moment and run the simulated test with different values of flow rate it would ...
by bsamxer
Sat Mar 12, 2005 8:41 pm
Forum: Tech
Topic: Mead & tomkinson b50 racers.
Replies: 17
Views: 4347

No need to apologize Bill your not rambling on It's good to hear your thoughts on the subject, its sounds like you will be putting a lot of effort into your engine, and pass on some info for the rest of us to share. I like your idea of testing all the different cams, albeit on computer simulation, b...
by bsamxer
Sat Mar 12, 2005 7:33 am
Forum: Tech
Topic: Mead & tomkinson b50 racers.
Replies: 17
Views: 4347

Bill, regards your B40 I don't know if you have found the same but the smaller engines i've found will not tolerate wilder cam's in the same way as the b44 or b50. I used a b44 enduro cam in a b40 engine that was ok. the b50 mx worked ok, when I tried the reworked mx cam I found problems, at first I...
by bsamxer
Fri Mar 11, 2005 6:23 pm
Forum: Tech
Topic: Staggered Cooling Fins
Replies: 21
Views: 4774

head casting

Ed, I think what you have is one of the batch of heads from the last speedway engine, have you had it long and whats your plans for it.
by bsamxer
Fri Mar 11, 2005 8:43 am
Forum: Tech
Topic: Staggered Cooling Fins
Replies: 21
Views: 4774

JB, Cheney built a c15 in 65 with extended finning,but every other fin was left as was. I have a replica of this bike, simon Cheney altered the head
and barrel for me, it looks mean for a 250 I'll get some pictures posted.
Paul.
by bsamxer
Tue Mar 08, 2005 8:38 am
Forum: Tech
Topic: Porsche 911 / B50 BSA
Replies: 36
Views: 15881

Stan, it was the brass outlet fitted into the top of the crankcase I meant, does this vent the crankcase's. We placed a simmilar vent on my C15
with a one way valve from a racing fuel cell, turned the other way round.
a very neat valve but expensive.it sure helps the engine to rev.
Paul.
by bsamxer
Tue Mar 08, 2005 8:17 am
Forum: Tech
Topic: Porsche 911 / B50 BSA
Replies: 36
Views: 15881

Stan the vent behind the barrel, is it connected to the1 inch tube or is it directly venting the crankcase.
Paul.
by bsamxer
Tue Mar 08, 2005 12:02 am
Forum: Tech
Topic: Mead & tomkinson b50 racers.
Replies: 17
Views: 4347

Bill, Do you mean that the timing specs were designed for the goldstar scrambler, I know the b44 victor mx cam is simmilar, but my point was that it is an MX cam and cannot be expected to work for every type of sport especially roadracing. although it did work well for M&T but in endurance racin...
by bsamxer
Mon Mar 07, 2005 4:29 pm
Forum: Tech
Topic: b40 racer
Replies: 24
Views: 6706

Bill, I'm sure that if you spent as much money on replicating a B50 into the 21st century as has been spent on the likes of replica manx nortons and G50's you would be able to hold your own against them. people have switched on to them in the last ten years for this exact reason, you dont have to pa...

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