Hi beezageezauk
As the service sheet is a BSA issue, I'll go by that. I agree with what you say, although the Haynes (bless'em), like you say, says that Sect 30.7 is for earlier engines then lists 1960-2 in that section! (My Haynes is a recent reprint) Never had this problem with a Triumph as whatever settings were made, they always rattled!
Appreciate your imput beezageezauk.
TTFN