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Messages - Calum

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Singles / Re: bsa b31 plunger MO1L magneto
« on: 15 September, 2021, 19:05:55 »
The explanation with reference to control levers can sometimes be confusing - my girlfriend's NH Ariel has taught wire advance (as does my B31) but her control lever is forwards to tension the cable (I assume the control lever is a right hand one repurposed!)

If it's standard your B31 should be taught wire advance. Looking at the points cover, the control cable should enter the magneto on the right as you look at it. If so, then your control cable needs to be taught (magneto fully advanced) and the points just opening when the engine is at 7/16" before TDC. If you are using a tool that screws into the plug hole to measure the distance, do remember that it is at an angle and not parallel to the piston stroke (as a result you'll be looking for a figure nearer to 15mm rather than 11mm, hope this makes sense)

1953 Plunger B31 here with the same oil tank also

The Star and Garter / Re: Clutch Parts
« on: 15 July, 2021, 18:51:05 »
By the time he got back in touch he had already chucked them! :'(

Oh well, it was a nice offer and I tried!

Singles / Re: Oil on club runs
« on: 15 July, 2021, 18:47:15 »
Hi Callum,

BSAOC Branches are well attended on bikes and some have attendance trophies for branch members.  Some do runs in the evening and weekends and there are the Branch Weekends that include camping and a run out.
There could be other BSA owners and even BSAOC members no too far from you and in the same position.  You could consider sending an invite through this Forum or through The Star to meet up at a local cafe or pub.  You never now you may get a good response.  As you are a younger member you may also attract younger people to BSA ownership - the Club needs them.


Yes indeed, I am all too aware of people in clubs having a grumble but not willing to do anything themselves! If I want meets and runs on weekends I can organise some myself with the support of local sections I am sure, so it wasn't too much of a grumble more an observation.

My two local branches are W Yorks and Manchester but both branch meeting points are 30 miles away or more, which is a long way home when the meetings don't start till 8:30pm and I have to take my bike back to the workshop before driving home with work starting at 7:30am the next morning (currently waiting on planning permission to build my modest garage at home, and the living room is already occupied by my girlfriend's Ariel NH!)

To be honest I haven't looked too hard at local branch events recently as I have been quite busy so will take another look and make the effort!

Apologies for the thread hijack

Singles / Re: 1949 oil lines to oil tank
« on: 15 July, 2021, 11:19:26 »
Blimey Martin, you're making me feel guilty. I ought to get the Autosol out!! ;D

Singles / Re: Oil on club runs
« on: 15 July, 2021, 11:14:51 »
I am mid way between 3 different VMCC sections, and similarly between two BSAOC sections. I was out at a local VMCC 'machine night' on Tuesday evening - a nice relaxed gathering with some nice machines too (and lots of modern stuff).

It is the first meeting I have managed to attend since joining - most runs seem to be mid week which might well suit the retired populace of the VMCC but probably not great for attracting younger (employed) members. Next month the section will revert to the monthly pub meets. I enquired as to whether people still rode to them. "Oh no! Well I suppose you could if you wanted to..." which does make me question why own the things of you don't want to ride out on them on a sunny August evening  :-\

I still haven't made it to any BSAOC meetings or runs either yet but there's time yet I suppose - many events aren't running still as a hangover from the lockdown days of doom and gloom.

Singles / Re: Burman gearbox
« on: 14 July, 2021, 20:54:03 »
The info Pete has is very useful, mainly for checking bush clearances etc.

If it is jumping in and out of gear it will no doubt be worn selector forks/dogs, and/or excess end float on the selector cam shaft. Mine would pop in and out under load sometimes though, but usually the overrun.

If you're having trouble with false neutrals or finding the gear then the selector mechanism may be at fault too. You'll only really find out by working through the gearbox and looking at what moves (or doesn't)

The Star and Garter / Re: Clutch Parts
« on: 10 July, 2021, 21:03:09 »
Canít you private message him through this forum. Not sure how it works but somebody will

My guess is he isn't a member of this forum :-\

The Star and Garter / Re: Clutch Parts
« on: 10 July, 2021, 09:34:40 »
My girlfriend has messaged him, but he hasn't even seen the message yet. My guess is it's sat in his 'message requests' folder as they aren't friends on Facebook. Is there any other way to get in touch?

The Star and Garter / Re: Clutch Parts
« on: 06 July, 2021, 20:20:21 »
I would be interested in them especially if it saves them going in the skip! I'm not too far away. I'll pass on any I don't need. I don't have Facebook any longer but my girlfriend does so I'll try and get in touch.

Singles / Re: B31 Poor Performance
« on: 25 June, 2021, 10:28:40 »
That sounds very possible. Whilst they may have touched enough to not let a feeler or light pass, enough pressure on the wall to seal is different. I make piston rings from scratch quite a lot at work (from 1" up to around 10" bore) and I tend to 'cheat' and make them bigger on the OD which means they don't quite touch all the way around until well bedded in.  But it does mean as soon as they are ground to thickness they are ready to fit - no hot work necessary. On the applications I use them in it isn't really a problem and they do settle down.
I believe the proper way is to make the ring to the right bore size and then heat them and 'set' to give the correct spring. So your 40 thou over rings won't quite be sealing properly. It should be quite obvious on the ring I should think.

Singles / Re: B31 Poor Performance
« on: 18 June, 2021, 13:20:27 »
I'm running the same pipe as you (an Armours one) and I have to say it seems to go quite well indeed. In fact the bike kooks nearly identical!
I'm currently waiting for my mag to return from overhaul as it was not behaving at all when hot (ruled everything else out)

Singles / Re: B31 Poor Performance
« on: 14 June, 2021, 18:48:40 »
Hi Bess, Yes I've tried the needle either side of middle position which seems about right. The standard main jet is a 150. I've also tried a 160 and a 170 but reverted to the 150. At the moment I'm really struggling to see what it could possibly be.

Have you tried a smaller main? It might be too rich at wide open throttle... for any given speed, a larger bore will be drawing faster across the bridge and so more fuel. I wouldn't have thought a rebore of +.030" to have made much difference really but I know it can do. A friend had to mess about with his S1 Land driver carb jetting after only a .020" over bore (as a percentage it might be greater, 3.046" standard bore on a 2l) and it made a big difference.

I would have thought a mag would only get better with speed, and you'd get erratic missing etc not just like a speed limiting effect?

Singles / Re: B31 gearbox overhaul
« on: 08 June, 2021, 22:26:42 »
I've just done my plunger box, it wasn't a bad job at all really. They're simple units. Be methodical and pay attention to the details and you should have no trouble doing it yourself. I was sent some helpful tech sheets on here which gave some good figures for bearing clearances etc.

Singles / Re: B31 'snatching' in gear
« on: 03 June, 2021, 12:49:39 »
I have the service sheets and indeed, I did them up until the locknuts were flush then a bit more to allow for wear/worn springs. Obviously not enough, but worked nicely before so probably just need a bit more tightening. I made sure it lifted evenly with a DTI stuck to the primary inner casing.

Idie, thanks, I'll give it a go this eve.

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