BSA Owners' Club Forum

The BSA Workshop => Pre War => Topic started by: Edwardian Fred on 23 November, 2017, 18:03:40

Title: 1932 Blue star HELP!
Post by: Edwardian Fred on 23 November, 2017, 18:03:40


Hello there. I am currently restoring a 1932 350cc Blue Star.
I am struggling to sort out the frame which fits together poorly. Please can anyone with the same model around the Norfolk area allow me to come and take measurements from their machine.
This would be very helpful to help my stalled restoration. Possibly even give me certain measurements on this forum would help... 

Many thanks.

Title: Re: 1932 Blue star HELP!
Post by: Edwardian Fred on 23 November, 2017, 20:51:31
In fact I am in Norfolk, but would be happy to travel if someone had an example I could measure and photograph.

Alternatively, does anyone know of a museum with a 1932 Blue Star on display please 😉
Title: Re: 1932 Blue star HELP!
Post by: IanP on 23 November, 2017, 21:35:10
Have you tried contacting the National Motorcycle Museum? They may have an example or the relevant information you require.
Title: Re: 1932 Blue star HELP!
Post by: Edwardian Fred on 24 November, 2017, 03:23:41
Thank you for the suggestion.  I went to the National museum and they didn't have a 1932 example. The frame and rear wheel (and even engine) are quite different on a 1932 machine which makes it really difficult to check my machine... The frame number is correct for year, but the lower rails don't fit right when bolted up. Just need to figure out if something is bent or incorrect...?
Title: Re: 1932 Blue star HELP!
Post by: DEAN SOUTHALL on 24 November, 2017, 08:39:57
Have you been in contact with Jules Dassen, the club's pre-war tech consultant?
Title: Re: 1932 Blue star HELP!
Post by: Edwardian Fred on 24 November, 2017, 10:18:12
No, that sounds like a good suggestion. Would you have his email address please.  Thank you very much.
Title: Re: 1932 Blue star HELP!
Post by: MALCOLM.JOHNSON on 24 November, 2017, 11:05:49
Hi Fred, I have a very original 32 Blue Star which is a 500, but I am sure all other details will be the same. Let me know what measurements you require. I am in North Yorkshire.
Title: Re: 1932 Blue star HELP!
Post by: JulianS on 24 November, 2017, 11:51:04
Contact detail for Jules will be found in The Star the BSAOC magazine.
Title: Re: 1932 Blue star HELP!
Post by: Edwardian Fred on 24 November, 2017, 13:48:58
Hello Malcolm. I've  seen pictures of 1932 500s that have a squared sump much like the later models. Does yours have a squared profile or like the 350 a rounded one with the sump cap on left hand side of the bike?  Thank you very much for responding, I will get together the different measurements I req and get back to you.
My model has a left hand brake pedal, with a shaft running across to the right hand side. Is yours the same configuration?
Title: Re: 1932 Blue star HELP!
Post by: Edwardian Fred on 24 November, 2017, 13:50:04
Thank you Julian for the intel  :)
Title: Re: 1932 Blue star HELP!
Post by: MALCOLM.JOHNSON on 24 November, 2017, 17:17:10
My 32 Blue Star has, what I would call a "square" sump with rounded corners to the front, with the filler cap to the right. Brake pedal is on left with crossover to front and rear brakes (dual braking off pedal). Right hand handlebar lever operates front brake only.
Title: Re: 1932 Blue star HELP!
Post by: Edwardian Fred on 24 November, 2017, 21:04:02
Hello Malcolm, sounds like the bike frame is identical, and the engine is very similar. Could you please take a few initial measurements for me to work out if my frame is warped...
1. The width between the two front down tubes.  (i.e. sump width.)
2 The width between the inside faces of the rear axle brackets.
3. The width between the inside faces of the frame brackets for the brake crossover rod.

I realise this is easier said than done, I am very appreciative of any assistance you can give me. Many thanks.
Title: Re: 1932 Blue star HELP!
Post by: MALCOLM.JOHNSON on 25 November, 2017, 11:07:49
Been on my back under the Blue Star this morning - freezing it was too! 1. This is as you say crankcase width which is on mine 4 1/8 inch. 2. Difficult to achieve an accurate figure without removing the rear wheel, but you will be very close at 6 1/8 inch. 3. Also governed by the crankcase rear through bolt, but the bosses for the brake rod (a couple of inches to the rear of that bolt), are 4 1/4 inches apart. Personally I would base measurements for 1 and 3, by fitting the bare engine crankcase in place. I have used fractional imperial units as I believe that is what would have been used at the time. Hope this helps. PM me if you need further details.  Malcolm.
Title: Re: 1932 Blue star HELP!
Post by: Edwardian Fred on 25 November, 2017, 12:41:38
Thank you very much indeed Malcolm, you are a martyr for the cause.
 That is superb!
I will let you know how I get on.
Title: Re: 1932 Blue star HELP!
Post by: Edwardian Fred on 26 November, 2017, 19:49:03
Hello Malcolm. I've found the rear "A" member that comes from the rear axle to the seat is wrong or very misshapen to accommodate a wider wheel. I think the front down tubes may have been bent too which is a real headache. Do mind taking a few more measurements for me please, so I can persuade everything back to standard.
Title: Re: 1932 Blue star HELP!
Post by: MALCOLM.JOHNSON on 28 November, 2017, 20:34:29
No problem, but because I do not visit the forum every day, I suggest that you PM me with the information you require. Malcolm.
Title: Re: 1932 Blue star HELP!
Post by: Edwardian Fred on 29 November, 2017, 14:02:53
Hello Malcolm. Please could you take a couple more measurements from your Blue Star for me please.


I just require the length of the spacer between the engine and frame on left and right side and the same for the gearbox bracket left and right. I hope you can help, then I can straighten the old girl. Many thanks
Title: Re: 1932 Blue star HELP!
Post by: Edwardian Fred on 30 November, 2017, 14:04:05
Hello there. I have also been PMing, but they don't seem to be going through...?
Title: Re: 1932 Blue star HELP!
Post by: MALCOLM.JOHNSON on 30 November, 2017, 17:48:52
Measuring those is easier said than done. The ones at the rear of the gearbox plates were easy to measure, as I did originally make a pair slightly different to assist with drive chain alignment when I was commissioning the bike and the original ones I saved are 20mm (os) and 44mm (ns) - I changed to something like 22mm and 42mm to offset the rear of the gearbox towards the ns slightly. I would temporarily make the rear spacers to near original sizes given out of suitable tubing, which should give you enough of a guide to assemble the frame parts and work on chain and wheel alignments. Without lying the bike right over it is very difficult for me to measure the engine ones. I would need the bike outside and one of my pals here to hold the bike. When you come to make the spacers proper, they are waisted, not a plain thick walled tube. Have fun!   
Title: Re: 1932 Blue star HELP!
Post by: Edwardian Fred on 30 November, 2017, 19:04:19
Thank you very much for those measurements. I'm definitely alot further on thanks to you. The issue I have is the gearbox plates/yokes are similar but incorrect for the model and will require modifications. Therefore I really need the engine spacer measurements. Is there any way you could get a rough measurement of them or take a plasticine impression and measure that? So grateful for your help, if you can Pm me your address, there's a bottle of whisky in it for you 😀
Title: Re: 1932 Blue star HELP!
Post by: MALCOLM.JOHNSON on 30 November, 2017, 21:00:09
I have sent you a PM. Look in your messages. Malcolm.