Prompted by my visit to C&D.....
On all the bikes I've had (principally Nortons), fitting new seals has just been a matter of sliding the seal down the stanchion from the top end and securing it under the holder. But then Norton stanchions are the same diameter all the way down.
The lads at C&D say that because of the different diameters going down the BSA stanchion (which in truth are only slight differences) this will rip the new seals and I need to fit the seals & holders from the bottom - ie dismantle the forks, take the bushes out etc.
I'm a bit reluctant to disturb bits that seem to be working well. On the other hand, I do respect what they say.
The Haynes book of lies is characteristically silent on this point, however BSA service sheet 706 does echo C&D advice.
Any views?