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Topics - BeenyBoy

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Singles / gear selector problem
« on: 06 November, 2017, 12:30:09 »
B31; 1955; M series type gearbox

Help !... this is doing my crust in !!!  I've assembled the gear selector unit as per the service sheet but once the springs are on they pull the pawls away from the ratchet plate. When I put the unit into the box I have to lever the top pawl carrier past the stops on the gearbox
I cant see there is another way of putting it together...believe me I've tried !... so what am I missing ????

Singles / B31 gearbox query
« on: 30 October, 2017, 17:45:01 »
In the process of putting back together my B31 (plunger) gearbox- according to the bible it is imperative that the dot on the selector quadrant is lined up with the dot on the casing...slight a dot on the quadrant but there is nothing on the casing.... any ideas ?

Singles / B31 Magneto oil seal
« on: 19 October, 2017, 14:51:32 »
Hi guys

Partway through a B31 rebuild and come to refit the magneto; I've put a new oilseal in the housing - my gut instinct says spring/open side  to the inside- ie towards the pinion or into the timing chest...  but when I've peeled the old seal off the pinion its fitted the other way round- ie spring towards the magneto.

Which is correct ?


Singles / B31 Small end bush
« on: 28 September, 2017, 16:52:32 »
Rebuilding a 1954 B31 and the small end bush is u/s- virtually in two clearly a replacement is required. (Bike hasnt run since 1974 )
Obtained a new one but it is far roo large both internal and external. Now I've just had an interesting chat with a nice man at Hawkshaws who have stocks of "old" "new" stock but he thinks these were supplied "unfinished" by BSA and need to be machined (reamed) prior to fitting....anybody come across this situation ?


Singles / B31 piston rings +40
« on: 15 August, 2017, 16:10:59 »
Hi guys

Anybody know where I can get a set of +40 piston rings for a B31 ?

Singles / B31 Cush Drive Nut
« on: 23 July, 2017, 15:47:28 »
I cant get the cush dive nut off (B31 1955  Plunger) ...its been really butchered by a previous owner but I cant get it to move; There doesn't appear to be a tab washer behind it- between the nut and the spring- I've tried stiltsons and a big hammer but cant shift it.......any tips gratefully received !!


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