Tappet block Restrainers

[MikesComet]

Hello, I've recently learnt that my 1935 250 Comet may have been supplied with the above when new. Could somebody please advise if this is the case or even advisable if not ?

Thank you 

[Doug]

The tappet guides sit in tapered bores and are held in by a brigde clamp.

Clamp looks like this:


And a drawing for it:


Larger image HERE

PDF version HERE

As noted on the drawing first introduced for the redesigned 350EW around 1927. The clamp remained the same for the subsequent 250/350cc models.

-Doug

[MikesComet]

Thanks very much Doug, I couldn't ask for more. 
Regards 
Mike