numbers question - what bike is this?

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numbers question - what bike is this?

Post by c55427 » Thu Jul 26, 2007 6:01 am

I bought a parts bike of ebay, just because I was kinda bored and curious what these C15s look like up close. It should be interesting tearing down the engine.

Frame:C15-38335
Engine: C SS2870
HC

What year is this bike?
What cc?
What year is the engine?
Does the engine match the frame?

The bike was in worst condition than I expected since it appears to be have dragged out of a swamp. The head may be good, but the rest appears shite.

So what is it?
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Post by xto » Thu Jul 26, 2007 1:14 pm

I make it to be a 1961 C-15 Scrambles.
250 cc
Bike and frame are numbered such that they probobly match, but BSA didn't start using same numbers on both 'till '67 I think..
I got my info from a drop down menu at the top of the page at www.forum.britbike.com Look for a tab says "BSA Info " then "Identification" will be one of the drop down options
Hope this helps
xto
73 b50 mx/streeteater-"Butch"

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Post by c55427 » Fri Jul 27, 2007 4:22 am

I got the head off, the piston is solidly locked into the steel barrel. I'll try to break it free, but I suspect the barrel is shot. Do people re-line them?

Perhaps I am crazy to think I could it this hunk running... ;)
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Post by xto » Sat Jul 28, 2007 3:47 am

People do reline them and I have read some on this topic- but have no experiencew/same. I suggest you contact www.evengineering.com (a frequent poster and most respected builder of race proven unit singles) and discuss your project w/Ed. Good luck- keep us posted...
xto
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Post by c55427 » Tue Jul 31, 2007 3:44 am

Why is a C15 off topic??? It's a BSA single!

http://www.b50.org/c15.htm
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Post by b50root » Tue Jul 31, 2007 6:44 am

I think it´s off topic. We don´t discuss all BSA Singles here. like sloper B33 B34 and so on. Way too big to cover all singles.

My Idea was in the begining just for the OIF´s B25 and B50.

But we have so much in common with the B44 and all CCM´s.

Rickard

Ps we could get lots of new visitors by expanding the forum to all singles.
Is that what you members want? I could easy open op new sections.

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Post by beat » Tue Jul 31, 2007 1:40 pm

hi rikard
I am not shure it is good to open the forum for al kind of BSA singles.
the tech-part is geting to wide I guess.
I would maybe like to here and see more storys and pictures from our bikes on the road, where they reach (ore not reach :!: ) and what experiences they have made.
maybe a topic:" on the road " ore "way outh" ore " traveling B50 " ore so.
this just as a idea, not a must. :cool:
greetings
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Post by c55427 » Wed Aug 01, 2007 2:29 am

I understand that you wouldn't want to allow all BSA singles in. But the C15 is an earlier generation of the B25 engine. See Rupert Ratio's book. The B25 directly evolved from the C15. We're talking apples & apples. Not apples & oranges.
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Post by beat » Wed Aug 01, 2007 8:10 am

Yaes, in my opinion , the Rupert Ratio Book gives a good circle of engines they are simular in the technic. so those bikes to discus in this forum make sense I guess. :cool:
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Post by TomH » Thu Aug 02, 2007 7:44 am

Hi Rickard,

I think the forum/site should be for all BSA Unit Singles C15/B40/B25/B44/B50 + specials i.e. Cheney,CCM etc. I have a B40 and my interest is in performance/tuning. All unit BSA singles share so much in common in terms of tuning/rebuilding/reliability mods that I would welcome more posts and posters from C15/B40 owners. It does get a bit quiet round here sometimes. Widening it to all BSA singles would I feel be too much and these (B31/B33/Goldstar/M20/M21 etc) are catered for elsewhere.

I would like a B50 or two, but not many were made and they are now going for silly money. Whereas C15's, B40's and B25's are easier to find and within my price range.

Tom

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Post by minetymenace » Thu Aug 02, 2007 12:36 pm

IMHO

I would like to keep the site primarily an oif site (B25/44/50), but I see no reason why there should not be a section for the other single models that evolved into these wonderful engines.

As we also cater for the badged versions of the machines (ie CCM, Triumph, Norton) how far back would you concider we go? B40/C15 OK, but what about T20, C11? I would suggest that pre-unit machines were too old for this site (at the moment).

My only reservation is that there are (as TomH says) many more of the C15/B40 machines and riders about, and their inclusion would tend to dilute the specialist nature of this site. I don't want to be cliquey (I find the posts on non-oif machines interesting), but this site is WORLD FAMOUS for the depth of knowledge contained within the site and forum members pertaining specificaly to the oif machines.

A seperate site for the pre oif machines might be too far removed as there is much duality between the older and newer models, perhaps restrict it to just the engines of the older models (imagine the discussion of the paint specs of C15's, the B50 one was long enough!!), but on balance I would like it to remain oif (but of course welcome comments from those who aspire to the ultimate BSA single but have yet to be lucky enough to own one for themselves).

Descrimination is a positive thing, vive la differance.

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Post by TomH » Thu Aug 02, 2007 1:55 pm

"I would like to keep the site primarily an oif site (B25/44/50)" Well, you've excluded 99% of B44's for a start! Only the Victor GP and a few works B44's were OIF :mrgreen:

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Post by b50root » Thu Aug 02, 2007 2:37 pm

We can do a section just like we did on the P92.
Sections for B44, B40 C15
And then undersections like tech, for sale, Parts wanted, Parts for sale, Supplier, Bikes for sale for every section

Rickard

Just let me know or should we make a voting for that?
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Post by minetymenace » Thu Aug 02, 2007 3:03 pm

Go for it Rickard!! The interest is there, and you can always change your mind later....

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Post by TomH » Fri Aug 03, 2007 11:44 am

Hi Rickard,

I'm not sure it's going to work splitting the Tech, For Sale, Parts Wanted etc up into different models. The fact is that the engines particularly are so similar that a problem for a C15 may equally apply to a B44. What might happen is that site visitors will only go to the section for their bike. There might be a problem they have solved and that they could help on that they will not see because it is posted under another model. Or people will do multiple posts trying to get attention for their problem/part wanted or part for sale. Clutch hub for sale could go in 5 places now as the same part fits 5 bikes!

Plus a lot of us modify our machines. My B40 has a B44 barrel + piston, B50 Cam + clutch mods etc. So where do I post?

The great thing about this forum for me, is it's international nature. It's not dominated by Europeans, Brit's, Americans or any nationality (like some).

But the fact is, that B50's are rare and only a percentage of owners are internet users.

To widen the participation on this board and have more people sharing their knowledge etc, I think having more resources like pics, technical mods etc for the C15/B40/B44 is the way to go. Get people who know the models like Kommando to write some!

I can understand Minetymenaces's comments on paint specs for C15's. But, because of the technical nature and expertise of this board the concours rivett counters don't seem to participate much anyway. We make to many mods from standard and actually use our bikes.

I see the BSA unit singles as a family of engines/bikes with the B50 as top dog. And the owners of unit singles as one family also.

Tom

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Post by minetymenace » Fri Aug 03, 2007 1:32 pm

Tom has made some good points. The For Sale/Wanted sections are not used as much as the technical bit, maybe these should contain all the For Sale/Wanted, Similarly the Project bikes, these are often a mix and as they are project rather than engine specific, this too could be left as one section.

Perhaps the rule for posting in a particular section (C15, B44 etc) should be "Post in the section pertaining to your crank cases", but I agree that there will be some overlap.

How about this for an idea: Instead of deviding the Tech section up into engine types, how about dividing it up into say, Farme, Cycle Parts, Gearbox, Valve gear, Head, Barrel, Bottom end, ignition etc.. I'm not saying that it should be this many (or these) sections, but you get the general idea. In this way the topics would not be engine specific, but topic lead and members could see clearly the tips and tricks used on all engines and negate the need for double posting.

We should not alienate the "rivit counters" as they maintain the "breed standard" I guess we all have the desire to own one concourse bike (mine is my tripple, Mark and his 1802 CCM :lol: etc). The reason this site is so technical is that tuners have different ways of acheiving the same thing, and if you wish to keep your bike as it left Small Heath, there isn't a lot to discuss. We all can admire a 100% standard machine, but some of us just can't stop tinkering.....

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Post by b50root » Fri Aug 03, 2007 2:09 pm

minetymenace wrote:How about this for an idea: Instead of deviding the Tech section up into engine types, how about dividing it up into say, Farme, Cycle Parts, Gearbox, Valve gear, Head, Barrel, Bottom end, ignition etc.. I'm not saying that it should be this many (or these) sections, but you get the general idea. In this way the topics would not be engine specific, but topic lead and members could see clearly the tips and tricks used on all engines and negate the need for double posting.
Hmmmm Haven´t I seen that before? :???:
http://b50.org/phpBB2/viewtopic.php?t=411 :???:

Yes I like that idea. We ( I ) should have done that long time ago.

What do you say about this:

Make a new group called Misc.

Move all these forums to misc:

Projects bikes
Bikes for sale
parts for sale
Parts wanted
News
Tales of Woe
Supplier
Off topic
BSA Rally
Members


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Post by minetymenace » Fri Aug 03, 2007 2:27 pm

Oh dear, yet again I have come up with an idea that I though was original only to find out it has been done before! :oops: No plagiarism intended Rickard.

I would like to keep the “members” section separate, might induce people to sign up if they think they are missing something (like the BSA Employee Competition, come on you Yanks and Antipodeans, extract your digits, or is it that there is no beer on offer?)

I like any idea I thought I thought of, even if I find out later I thought the same thought you thought, later :???:

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Post by b50root » Sun Aug 05, 2007 3:13 pm

minetymenace wrote:Frame, Cycle Parts, Gearbox, Valve gear, Head, Barrel, Bottom end, ignition etc..

Any more sections? Do we cover all here?

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