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Topics - Bles31

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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.
                       

2
Which BSA do you ride? / My B31
« on: 11 September, 2017, 13:47:53 »
Hello  there.
This is my  1952 B31 which has been living in my garage virtually untouched for 12 months. I've just recently got it running, but a few jobs to do. You might notice front wheel is well off centre - nearly touching right hand fork. Looks like it's not charging very well, but basically it seems a sound bike which I want ready for cake shop adventures around the Lake District next Spring.

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Singles / B31 stand
« on: 21 August, 2017, 16:23:05 »
Hello - this is my first post. I have a 1952 B31 which I am currently making roadworthy. I will be putting it on the road to use regularly -  mainly to visit cafes and cake shops around the Lake District. One of my major problems is the lack of a useable stand so that I can work on the bike. It's currently leaning against the wall, which isn't convenient.  The bike has a centre stand but this offers no leverage at all and I find myself having to lift the weight of the bike to get it up on the stand. This is too much for my 69 year old back! Despite searching around I can't find a side stand to fit the plunger frame. Can anyone advise on side stand, source of better centre stand, mod's ?
Thank you.

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