The BSA A7-A10 Forum
Bikes, Pictures, Stories & more => Wanted & For Sale => Topic started by: Gavin on 01.06. 2017 15:23
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I'm getting a quote on having an airbox for my 51 Plunger 67-4594 (Air cleaner and battery carrier combined, plus the element cradle) professionally made using a complete one that I have as the template. Knowing how rare these critters are, if anyone else is interested in purchasing one, i'd be happy to hear from you. Serious expressions of interest with no obligation to purchase.
I figure 1 airbox will cost a pretty penny, but if I can get a second quote for an order of several, I'd hope the price will reduce and all benefit.
Yes risk for all of us. But finding then buying these things in any condition is filled with a far greater risk. I will post pix of the new airbox if the initial price does not prevent me going ahead.
Next negative, for those who know the sky has fallen in, I am in Western Australia, happily near the most remote capital city in the world. So postage won't be free !!!
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*eek* I was lucky enough to pick one up without the filter last year, & yes their like GOLD..
I hope you get many orders to get the price down.. *wink2*
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I have been able to make the air cleaner element by modifying (chopping up) a K & N element and fitting in place of the original media. Think it was the rectangular K & N element to suit a trident air box. It is the same (or close enough to) height as the original. Use some silastic ("a little dab will do") to seal the new media into the old air box.
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I have been able to make the air cleaner element by modifying (chopping up) a K & N element and fitting in place of the original media. Think it was the rectangular K & N element to suit a trident air box. It is the same (or close enough to) height as the original. Use some silastic ("a little dab will do") to seal the new media into the old air box.
Ditto here.
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But we're talking the whole unit here. I still have the original but I'd say quite a few don't. I would be interested in a spare at a realistic price. Please get a quote on say 10-20. It could be the start of a proper spares scheme, not dodgy eastern repros (until they get them done cheaper there) *problem*
Cheers
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There was one on ebay a while ago but the £320 price tag put me off I decided I will make one :)
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I have about a quarter of one that's been cut up for some reason.. I think they wouldn't be all that hard to make *dunno*
I have no use for one though (alloy head on Plungie) so count me out
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Sorry to those who may have been interested. My guy took a look at the airbox and decided it was out of his capability range. Gotta respect someone who declines a job rather than promises the world and produces a pigs ear.
So I will keep looking for one, and if I find 2 will keep you in mind Musky.
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Thanks for letting us know Gavin.
Cheers
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There was one on ebay a while ago but the £320 price tag put me off I decided I will make one :)
MB Transits per chance??
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Hi,
If you find either someone else to make, or come across a replacement then I'd be very interested as I've been looking for a fair while and getting no joy.
I have been in contact with the National Motorcycle Museum and they have offered that I can take measurements from their Maudes Trophy bike and may have someone who can make from that, but it will be a while before I can arrange either.
Richard
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I have about a quarter of one that's been cut up for some reason..
DITTO... *eek* which bit you missing? we might be able to make up a full one between us? *work*
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Just thinking aloud: The flat metal work would not be too difficult to fabricate. The filter box, with the rounded edges; could that be made in fibreglass if a suitable mould were created?
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Quote from: duTch on June 11, 2017, 12:43:00
I have about a quarter of one that's been cut up for some reason..
DITTO... *eek* which bit you missing? we might be able to make up a full one between us? *work*
I'm not even sure where it is at the moment, but what I have is basically just part of the attachment strap and a bit of sheet metal each side of it- stuff that should be easy to make.
I don't need one anyway, just curious. ..if I needed one and had measurements I'd be silly enough to have a go- if I had time
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Hi,
If you find either someone else to make, or come across a replacement then I'd be very interested as I've been looking for a fair while and getting no joy.
I have been in contact with the National Motorcycle Museum and they have offered that I can take measurements from their Maudes Trophy bike and may have someone who can make from that, but it will be a while before I can arrange either.
Richard
Hi, there's an old guy who was brilliant at fabrication and welding - real time served engineer who I would consider more than capable of constructing one but pursuading him to do so may be trickier. He's called Ray J Pettet and is based in Nottingham. I last used his services a few years back to take my tank apart, remove big dents and re-weld it back together - did a fab job. But no idea if he's still in business or not. He may be worth a punt? Let me know your where abouts (roughly) if interested and I'll give you the heads up and if you need measurements, I may be able to assist.
Cheers
RoadRunner.
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Hi,
Sorry for delay in response, but yes if its possible to provide measurements that would be fantastic as any help would be appreciated.
At present I have the wrong box in place which doesn't match and carb is unable to either attach the rubber shroud or Amal supplied alloy rim.
Many thanks for the help offered.
Richard
PS based in Norfolk
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Folks,
I've been very fortunate in that one member of this forum has very kindly spent a lot of time and effort in giving me lots of photos and measurements for both the box and filter. Hopefully this will be enough to enable my friendly neighbourhood engineer to create a new one for me.
I'll update you on progress when I get more info. Might be worth asking him to make 2-3 as sure they'll be well received!
Regards
Richard
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If you're running an informal tally of possible customers, then please count me in too. Thanks!
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Could you publish the photos and measurements here?
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-We have a complete used one here https://mikesclassiccyclespares.com/product/67-4594/ (https://mikesclassiccyclespares.com/product/67-4594/)
Also have a spare used element https://mikesclassiccyclespares.com/product/67-4600/ (https://mikesclassiccyclespares.com/product/67-4600/)
and have the strap for the battery carrier that I am about to list now 29-4657
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Thanks Mike, Bought it.
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Yeah I didn't think that would last too long ;)
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Hi,
Frustration indeed.
After one of you kind gents provided me with detail drawings and photos of the airbox I was more than hopeful that someone would fabricate the airbag for me.
I have now tried several fabrication firms to be told they can only work to duplicate an existing one, or need 3D drawings. Neither of which I have.
I guess the search to various jumble sales will now have to continue in the New Year.
Richard
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I'm very pleased that my bike still had those bits on it. I just needed to buy the shiny battery strap and bolt arrangement.
I can imagine someone using a good filter case to make a mould to then create new GRP filter cases. The other parts could be fabricated from flat stock.
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Hi Richard, I am about 8 weeks off retiring, and plan to tinker on a few bikes I have in the shed as 2018 unfolds. Since starting this post I have acquired 2 more airboxes, and before anyone starts salivating, they are both accounted for on next years projects.
However, I would be prepared to try and make another from fibreglass etc. I will mess about for a while, and if I convince myself it's strong enough to support a battery I will try one the Plungers I am rebuilding, and see how it goes.
Meanwhile all the best at the jumble sales. I'll also keep an eye out in Aus if one appears here.
Have a safe n significant Christmas mate.
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...I would be prepared to try and make another from fibreglass etc. I will mess about for a while, and if I convince myself it's strong enough to support a battery...
Good job! As there will have to be a metal bracket for the battery the fibreglass part may not have to carry much weight. As I see it, (from memory) the tricky bits will be setting a threaded boss in the corner for frame attachment and the inner part, where the rubber hose goes.
If these rare things can be manufactured I reckon they will be in demand.
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I can get them made, But there is a catch,. While Its admirable someone made drawings, and diagrams, in reality in manufacturing its often "open to interpretation" so only a Print in solidworks, or similar CAD files are worthwhile.
But *IF* someone can locate a friendly associate who has access to a 3D scanner then along WITH drawings, pictures and diagrams then you can get something accurately replicated.
Not everyone still uses Solidworks, and tech has marched on, but its still a industry standard, If you have other software, let me know and likely I can work with it.
I DO have access to the manufacturing to make these, If you guys want to move fwd, PM me. (I have some other bits in the works)
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Guys,
Thanks for the offers/suggestions, its much appreciated.
At present I've not yet been able to find anyone who can do me a 3D drawing, but will keep looking locally and as I understand then standardworks is the application.
Im still looking for the airbox, but I continue with no success. Hope to visit a few bike jumbles in the early part of the year so my fingers remain crossed.
Regards
Richard
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Sorry,
should have been Solidworks, not Standardworks.
Richard
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I have a spare rigid frame airbox- for early A7. Is it significantly different from the plunger airbox? And, do they use the same filter element, as I don't have one of those, was planning to make one as others suffested.
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They at slightly different in shape, and use a different filter/filter plate.I have a genuine filter plate for one of those here with filter in it.
https://mikesclassiccyclespares.com/product/67-4545/
If you look at our site You'll see we previously had the other type (plunger) as well (now sold), but if you look you'll see the differences in shape etc. https://mikesclassiccyclespares.com/product/67-4600/
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I'm very pleased that my bike still had those bits on it. I just needed to buy the shiny battery strap and bolt arrangement.
I can imagine someone using a good filter case to make a mould to then create new GRP filter cases. The other parts could be fabricated from flat stock.
We have that strap, and bolt arrangement....
https://mikesclassiccyclespares.com/product/29-4657/
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Hi All
(duplicate post *conf*)
Recently I have bought some replica vintage BSA parts from a chap in Czech Republic who sells them on eBay
his eBay name is joseph60.7771
I have to say his parts are 100% and very good value
It might be worth contacting him with a view to getting the replica's made ???
John
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Just made some Air filter element plates if anyone is interested... Replaces item 67-4600 I'll be listing them on our website in the next few days.
https://www.facebook.com/mikesclassics/posts/1688826421140732
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Hi,
Just ordered the air filter plate from MikesClassicCycleSpares, so hopefully one part less to search for.
Nice if you made the filter box too!
I've also found someone local to me prepared to do the 3D drawings so will see how that one goes as feed into someone who can then fabricate the part..
Richard
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Just dismantled the airbox on my '54 plunger and was pleasantly surprised to find everything there. If anyone wants me to take some measurements, more photo's or even borrow the part to measure/fabricate a replacement, please let me know. I'll be powder blasting it clean in a week or two and it looks good with no rust, etc. I won't be painting it for a while yet...
By the way I have found an 'engineering blacksmith' near to where I work (Warrington) who has done a great job recovering my front mudguard. If anyone needs some similar welding/grinding/straightening work, I can recommend him, but I'm not sure of the etiquette of such things on the forum. He has a degree in metallurgy, a workshop to die for and charges £40 per hour.
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If its in good nick, then by all means post up in the appropriate section (Tech) as this is the for sale section,
But take some good photos from several angles and orientation of the parts, measure what you can (especially the mount brackets) and try to make a "Blueprint" of it to illustrate it. If good enough one could make new ones from it. (Parts are only as good as the print). I have manuf sources but what they ask for now is 3d scans, as that is the final word in manuf these days.
But the reality is, you can only approximate a reverse engineered part if you dont have an example in your hand. (Close enough is good enough) There is 2 things to remember when dealing with 60-70 year old parts,, most were wildly inconsistent to begin with. (Show me 10 Norton Featherbed frames and Ill show you 10 different layouts on a jig). #2 unless its new out of the box, its probable that it could be modified, tweaked or different slightly than the identical bike parked next to it, Not to mention parts bin engineering where stuff was changed mid stream in production.
As i said, this is a very low production endeavor, and very low demand but I will be producing some other hard to find parts in the next 12 months, and not a big deal to add this to the "To-do" list.
My other airbox project is some Q racing air boxs. I have 2 examples and there is decent demand for them. Currently working on some modern machinery airboxs/filtration and slow going with some of the testing.
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I know that Plunger A10 and A7 air filter rubber connector hoses are different so are filter back plates also different?
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No GB. The A10 is longer in the stroke so the head sits 1/2" higher in the frame than the A7 hence the need for different rubbers (ribbed or plain *shh*)
Cheers
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I know that Plunger A10 and A7 air filter rubber connector hoses are different so are filter back plates also different?
As ^^above^^, and all components have same part #'s for A7,A10 7 Star Twin
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We may have another of these, complete with filter (all in used condition), possibly next week. Just seeing if anyone here needs it before it gets advertised...
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Yep id be interested. Some bliter has installed an M series box on my plunger and after putting the correct amal carb in realised the air holes dont line up by a long way.
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That offer was in Feb 2019
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i know its an old thread but ive extensive experience with fiberglass. I used to do custom painting and fabrication of front and rear guards side covers etc predominantly for harleys. Im chasing a battery holder air filter box for my plunger if someone has a spare they would lend me i will have a crack at making some moulds. I think using kevlar/aramid woven cloth would work better than glass fibre and cast in steel mounting lugs.
Just a thought if anyone is interested shout out. I'm in Western Australia.
Cheers
Pete
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i know its an old thread but ive extensive experience with fiberglass. I used to do custom painting and fabrication of front and rear guards side covers etc predominantly for harleys. Im chasing a battery holder air filter box for my plunger if someone has a spare they would lend me i will have a crack at making some moulds. I think using kevlar/aramid woven cloth would work better than glass fibre and cast in steel mounting lugs.
Just a thought if anyone is interested shout out. I'm in Western Australia.
Cheers
Pete
I really hope you get this idea off the ground; those filter housings are a rarity.
I've said this before; I reckon the young lads who bought cheapo old motorbikes in the 1960's thought binning that mamby-pamby air filter and fitting carb trumpets would boost performance, or at least make the bike look cool.
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https://www.trademe.co.nz/trade-me-motors/motorbikes/parts-for-sale/batteries-mounts/auction-3309821723.htm (https://www.trademe.co.nz/trade-me-motors/motorbikes/parts-for-sale/batteries-mounts/auction-3309821723.htm) saw this if of interest
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https://www.trademe.co.nz/trade-me-motors/motorbikes/parts-for-sale/batteries-mounts/auction-3309821723.htm (https://www.trademe.co.nz/trade-me-motors/motorbikes/parts-for-sale/batteries-mounts/auction-3309821723.htm) saw this if of interest
Starting bid $200 Yikes!
If good replicas could be made, the cost might soon be recouped and that one could go back on sale.
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im pretty confident in making the moulds and the final assembly but $200 is a bit out the price range at the moment.
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G'day 865.
In the not too distant future (hopefully) I'll be pulling down my plunger for rebuild. I could loan you mine.
Cheers
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Thanks Musky I'll have it back to you within a week . I'll keep searching for one in the meantime. I'll need one for mine anyway.
Cheers
Pete
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Hi Pete,
How ironic. I started this thread a few years ago and it looks like its come full circle in my own back yard. I have the required air box in my shed, not yet in use. So I will drop it in to you in the next few day as you are just up the road about half an hour away. Could you please PM me your address mate?
That would be the forum doing what it's designed to do.
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Hi Gavin
Pm sent.
Cheers
Pete
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Hi Pete,
How ironic. I started this thread a few years ago and it looks like its come full circle in my own back yard. I have the required air box in my shed, not yet in use. So I will drop it in to you in the next few day as you are just up the road about half an hour away. Could you please PM me your address mate?
That would be the forum doing what it's designed to do.
Wow! Great news.
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Goodonya Gavin.
Deserves an "Appreciation" point.
Cheers
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Deserving karma as well is Gav
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Update on airbox. Have almost finished the plug to take a mold from, just a bit more hammer work a spot of welding and some filler to round the edges. As well as do the angled drop off for the rubber manifold insert .Battery strap/mounting bracket about 30% done lol
Because I'm making a plug the overall size of the plug at the moment is around 2-3mm smaller than the original to take into account body filler primer paint etc. Once it is ready to take a mould from the dimensions should be on par with the original. I'm probably going to make some modifications to the air filter area so a modern foam filter can go in. Any suggestions please feel free to weigh in.
Cheers
Pete
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An absolutely massive thanks to Gavin for trusting me with his airbox absolute gentleman thank you.
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Great work. 👍
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I have an original air box complete with a volks air filter the only thing missing is the Battery strap which has been chiselled off, if anyone would like it, I am willing to sell it to the highest bidder, PM me with your offer.
By the way, I have just reduced the rocker box gaskets to £18 a set for member on this site.
TTJohn.
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Ready to make fibreglass mould.
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The fit of the rubber connector between carburetor and air filter box is rather tight. Are you able to test this before you go into mass production?
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Mine is an original one, with volks filter, last one I saw for sale was £250, I know mine needs a battery frame brazing to it, as the old one was removed, I can supply a couple of photo's.
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The fit of the rubber connector between carburetor and air filter box is rather tight. Are you able to test this before you go into mass production?
I am in the process of fitting the air filter manifold so it's all good. Am modifying the actual air filter element and the access cover as well . Will keep posting as I upgrade and or modify.
Same with battery carrier am working on that part now.
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Hi All,
I am just wondering if the E10 fuel would harm the fibreglass airbox?
John
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Hi All,
I am just wondering if the E10 fuel would harm the fibreglass airbox?
John
Is the GRP likely to get soaked with jollop? The outside will be painted of course.
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It's fuel resistant.