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Messages - Bles31

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Singles / Re: how to balance bike wheels
« on: 06 September, 2018, 22:42:36 »
That's a neat looking solution Royc. Nice find!

Singles / Re: how to balance bike wheels
« on: 31 August, 2018, 19:38:40 »
Wrap heavy solder wire round spoke?

The Star and Garter / Re: Lucas Electrics
« on: 11 August, 2018, 22:17:19 »
Good site. I used the information on dynamos to check mine out. Nice and ckear and I got the dynamo working, saving a large overhaul bill.

The Star and Garter / Re: Electronic ignition
« on: 11 August, 2018, 22:14:14 »
I've put Thirspark on my B31. Only 50 road miles done so far, but lots of starts at home while setting things up. It's easy to fit (on a B31) and the bike fires up first or second kick hot or cold. I'm pleased with it although I might replace some of the wiring as the bright red and green wiring supplied looks a bit out of place.

Singles / Re: 6 spring clutch help
« on: 31 July, 2018, 19:09:40 »
I seem to remember mine  being a bit wobbly with same  bearing fitted ( a two row ball bearing). Have you tried putting the clutch together and just nipping things up as a trial. I think the wobble will go away when it's all assembled. Worth five minutes test - no need to bend over tab washers etc while you try it.

Singles / Re: Centre stand B31 (1952 plunger)
« on: 17 July, 2018, 22:55:16 »
Thanks for pictures - looks same as my stand. I hadn't thought of  your ramp idea which will be handy in the garage. My concern is that I would find it impossible to get a wheel out for puncture repair at the road side with my current stand.
There must be a way to sort this. Where there's a will .........

Singles / Re: Oil leak
« on: 16 July, 2018, 18:14:22 »
No problem Phil.
The problem with your seal may not be visible to the naked eye. It may have worn or it may have aged and hardened to the point it is no longer elastic.
Either way , glad you got it out.

Singles / Re: Centre stand B31 (1952 plunger)
« on: 15 July, 2018, 16:20:19 »
Here's a couple of pictures of the bike and its' stand. It looks to me as if the bike has gone too far over the stand and is settled at the back, which fits in with the effort required to get it off the stand. The detail picture shows the stop on the stand butting up against its' mating face on the frame.  Does this look the same as any other B31's? The distance from pivot point to bottom of the foot is 210mm.

Singles / Centre stand B31 (1952 plunger)
« on: 14 July, 2018, 20:05:52 »
I have tremendous trouble getting my B31 on and off its' centre stand. When the bike is on the stand both wheels are on the ground. I can't feel any severe wear in the stand or it's pivot, but haven't actually stripped it down yet. Does anyone have dimensions for this stand ( leg length in particular) as I'm beginning to think its too short. Or perhaps there is a stop missing which is letting the bike go too far over centre and settling too low at the rear. Any help gratefully received as this is going to do my  back in one day!

Singles / Re: Oil leak
« on: 14 July, 2018, 19:53:26 »
By the way, when fitting the new oil seal  I found its metal housing to be quite soft and the seal particularly difficult to get entered square into the gearbox. May be teaching you to suck eggs but set yourself up with something to drive it in with rather than tapping all round its' circumference. A big socket or piece of tubing etc.

Singles / Re: Oil leak
« on: 14 July, 2018, 19:44:20 »
I pulled mine out with one of these. When I refilled the box I left the oil around 0.5" below lip of the filler cap. My measurements (a bit rough to be fair) indicated that filling the gearbox to the bottom of the filler cap meant that the seal was flooded with oil (hot thin oil after a run) . Theoretically the seal should retain this oil  but I think it's not necessary to fill that far (for the short trips I have done this far) and is only inviting a leak. My leakage has dramatically reduced. Others may have a view on reducing  oil level in the gearbox.

Which BSA do you ride? / Re: My B31
« on: 21 May, 2018, 19:17:19 »
That's very pretty. Same colours as my '54 plunger model, which is slowly reaching a roadworthy condition. Very nice!

Singles / Gearbox oil seal
« on: 17 May, 2018, 19:55:13 »
Had a search and this has been discussed before - but I can't find a solution.
I replaced a  leaky oil seal on the output shaft of  my '54 plunger B31. The leak persists! The seal is fitted nicely, square to bore and just below flush with gearbox case. Sprocket shoulder the seal contacts is in good condition and I have a felt and cork seal on the output shaft - which I think is intended to seal off the end of the shaft splines. I've looked at this again and again and can't work out why the leak is there and so  bad.

A few factors - I filled the gearbox to the level of the screw in inspection port on the right hand side of the gearbox as advised - this fills box to just about the level of the oil seal on the left side. Should I try less oil?
                      Ive read about putting grease into  gearboxes - possibly reduce leakage, but not something I've done before.
                      The oil seal is meant for a shaft diameter of 1.625 " (according to the size marked on the seal - which I believe refers to the associated shaft diameter not the seal size.) but the shoulder on the sprocket is 1.722" - not a lot different, but the old seal looks a bit stretched when I try it on the sprocket -         has anyone a sprocket they can measure for  comparison (I may be over thinking this!). Puts the shoulder on my sprocket at  between 1 5/8" and 1 3/4" which seems a strange choice for an old  british bike.
I can just let it leak but would rather not. Any advice welcome.

Singles / Re: Thorspark
« on: 27 April, 2018, 15:12:10 »
Two photos attached. Still not entirely sure about clearance above coil. Toolbox is another possible position, but require very long ht lead.

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