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#861003 10/17/21 7:51 pm
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T
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I have a pair of lower fork legs for a BSA WDB40 the type with internal dampers, I need to source a pair of stanchions & springs. Need to know what parts are correct as a lot of BSA fork parts are interchangable but wont work properly together. The stanchions as far as I can find out have four holes drilled at their bottoms but so do some later A65,s / B44,s, I need to know the length of the stanchions and also the length of the fork springs. I have the part numbers but the diamensions would be handy as I have a lot of used fork parts for BSA models and dont wanna buy if I already have them..Springs I will buy new..... cheers Dave


1941 BSA WM20
1958 TRI-BSA 750 PRE UNIT
1957 THUNDERBIRD
1932 R E MODEL GS SPECIAL
1947 BSA YM21
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The short stanchions are 41-5116 and are 21 7/8" long. Often very hard to find but I think BBB has them.


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Considering that the stanchions 41-5116 are made presently in the UK by Velocette it should not be all that hard to find a UK dealer that stocks them if you don't have a good used set on hand. Also I find that a large percentage of used stanchions for any of the 50 plus year old British bikes are either corroded or somewhat bent so getting a new straight and smooth set are not a bad investment at this point in a British bikes life. But then many of the internal parts are also pretty worn out. I'd venture to say worn out internals are a worse problem than springs which don't seem to wear out as fast.

Peter


check out: www.bsaunitsingles.com
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Hi Thanks for measurement, will look thru my spares to see what I have, All my fork parts are in good order otherwise why would I keep them ? I do have a complete pair of A65 forks also 2 pairs of hard chromed stanchions as for springs I know I will buy new as don,t trust putting s/h ones in..


1941 BSA WM20
1958 TRI-BSA 750 PRE UNIT
1957 THUNDERBIRD
1932 R E MODEL GS SPECIAL
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There is an A65 stanchion close in length, but they can be pre damper rod so need the larger holes added to take the oil cavity between the bushes out of the damping, so as to allow the 2 way damper rod damping to do its thing. But I would still go for the new stanchions especially the hard chromed ones which reduce stiction and give longer life to the seals.


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