WD B40 cclutch

[straff52]

Hi, I am in the throws of fitting new friction and steel plates to my 1967 WD B40, as I have the clutch stripped I decided to fit new springs part # 40-33231 as shown in the parts catalogue, these are 42mm long.
On comparison with the old ones they are longer than the ones I have taken by approx 5mm and I cant compress them enough to start the nut on the studs.
So the question is, do the old springs fit into shorter cups hence why I cant fit the new longer springs and are there any longer cups available. I have located the part number (40-3218)for the cup which is shown in the parts list to go with the new springs but I don't know its length so cant compare them to the ones currently fitted.

Regards Chris

[Tigerfeet]

You might want to read this thread in twins. https://www.bsaownersclub.co.uk/bsaoc_forum/index.php?topic=15065.msg81323#msg81323

I'm pretty sure I have read about two different cup sizes - probably in one of the Rupert Ratio books.