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Exhaust valve lifter

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DADSBIKE:
Hi Chaps,
does anyone have a drawing or close-up photo of the exhaust valve lifter (decompression) on the engine of an S28 BSA (1928 493cc single)?
Mine just has a plate bolted between the tappets, where 'something' has broken off.

Thanks

john

JulianS:
John

Could you post a photo of the broken bit?

JulianS:
Does this look photo look about right?

I think the part is the "tappet guide plate with bush" part 24 420 which was a common part for the 1926/27/28/29/30 engines.

I think its the 1926 engine in the photo which comes from Pitmans Book of BSA by Waysider 1930 edition.

The second photo is from the 1926 parts book.

DADSBIKE:
Many thanks Julian,
 that's exactly the parts I need. I have made another plate but have yet to make the spindle, with some sort of cam at the tappet end. I was wondering about using the lifter spindle only from the M21......unless someone has the correct bit?!

Where do I find the 1926 parts book?

john

DADSBIKE:
Just found and ordered the parts book for 1928 from Draganfly.....

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