B25 spring washers for outer casing screws

[Beesy]

I'm hoping someone can clear up a doubt I have in my head.

I rebuilt my Starfire engine 12 years ago and now I'm doing another one.

I have a feeling that there should be small spring washers under the outer casing screws but I can't see any on any diagrams or parts lists.

I'm sure I didn't imagine it. Can anyone confirm?

Regards

[Mike40M]

Have had dozens of bikes ranging from 1930 to 2013, including 6 BSA singles.
Never seen any spring washers on any outer case screws.

[DAVE BRADY]

Hi,

No spring washers and do not over tighten them.  make sure the threads are clean and that there is no old sealant at the bottom of the hole.  I try to keep the threads dry to ensure better grip with least torque.

Dave.

[MadPete]

I agree. No spring washers on the case screws.

[Steve.S]

If you are concerned about washers, you c0uld have a look at Hitchcock's website and search for 140771 Timing Cover Screw Fibre Washers. These are tiny 1/4" ID washers that some manufacturers fitted.... (Royal Enfield?)
They're probably not necessary, but it's up to you.

[neil1964]

I fit those washers to the alloy A/B series chaincase drain and level screws as per the manual - not convinced they make much of a difference tho'.