BSA project.

[98tls]

Not mine,anyone able to tell me what year this thing would be roughly,has the thing been put together from two different bikes or is it as it should be (whats left of it).?Apparently put in a shed as a runner and left,has good compression etc.

[slofox]

With that suspension it is probably pre about 1953 from memory...

Fark - we usta make drag bikes outa those - fuel 'em on methanol, wind up the compression, put a drainpipe in the carb for a jet, spend an hour pushing the fuckin' thing round the pits to get it to start...blow your ear drums out when it finally did. And usually crash on the first run of the day...the "good old days" huh...? Can't say I miss the pushing much...

[Blackbird]

Yeah, reckon that Slofox has pretty much nailed it. Job to tell whether it's completely original or a mix. BSA were producing both jampot rear ends and your type between '53 and '55.

Can't tell whether yours is a 350 or 500 but have attached a photo of a B33 from 1955.

BTW, your oil tank cap is the rocker cover from a pre-unit Triumph

[98tls]

Cheers guys,its definately a 500.

[hospitalfood]

it is the type of thing i have been looking for as a bobber project.
what is the deal with it ?

[Brian d marge]

I've bought a A7 frame which is 49 onwards , with the same plunger rear end

Jampot was a name given to the matchless suspension units that were so large they resembled Jampots

any more photos available ???

Stephen

[98tls]

I've bought a A7 frame which is 49 onwards , with the same plunger rear end

Jampot was a name given to the matchless suspension units that were so large they resembled Jampots

any more photos available ???

Stephen

Just these 2 plus one of what he wants it to look like

[98tls]

it is the type of thing i have been looking for as a bobber project.
what is the deal with it ?

Not sure where he bought the thing but paid $700 for it,been sitting in his shed awhile and finally decided to do something with it,pistons been replaced etc but timimg was never done so that will be his first job.

[Brian d marge]

http://www.kiwibiker.co.nz/forums/sh...d.php?t=104855


Mines heading this way

Just waiting for some frame measurements

Stephen

[98tls]

http://www.kiwibiker.co.nz/forums/sh...d.php?t=104855


Mines heading this way

Just waiting for some frame measurements

Stephen

Nice work,oh to ave 1/2 the skills to attempt such a thing.Enjoy and keep us posted eh.

[Motu]

That's the one on ADVrider - and I told the guy from the start that it was a Goldstar,but he still doesn't believe me.

http://www.advrider.com/forums/showthread.php?t=504810

[jellywrestler]

engine numbers would be a help, ZB, BB or similar prefix would help with the period it was built followed by 31 32 33 or 34 denoting model and then the engine number would narrow it down even further
31 is 350cc B31
32 is 350cc goldstar
33 is 500cc B33
34 is 500cc goldstar
also is the head and barrel alloy or steel that may have been painted

[98tls]

That's the one on ADVrider - and I told the guy from the start that it was a Goldstar,but he still doesn't believe me.

http://www.advrider.com/forums/showthread.php?t=504810

Yep M thats the one.,hes a longtimer on the TL forum.So its a Goldstar.

[Ixion]

Head and barrel look to be a Goldstar. But they may be Goldie bits on a cooking bottom end. I suspect it's a bitsa.

[Brian d marge]

bugger me I've got a gold star frame


not


looks the same though , wonder if they used a lighter cast Iron for the lugs !


Mine

Well its a funny one ,

see the thread I posted for details , but its borne out of a bike I want , and a rapidly drying money source due to new house and kids


and the Japanese being anal about some things ...such as Im sorry sir I have never heard of SAE1020,,,,

So I will ( the current plan ) draw the thing in CAD, do all the calculations with the computer ( FEA) to size parts

If I can get it right first time , then minimise the machining ( tool changes, parts etc ) then that leaves me with a straight forward assembly and a lower cost ( now that that Dutch company has dropped it 3D printing costs mould making , if needed is as cheap as .........

Thats the plan so far ...........

I will draw the thing first , then go from there .......


Stephen

No